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Concave   Listen
noun
Concave  n.  
1.
A hollow; an arched vault; a cavity; a recess. "Up to the fiery concave towering hight."
2.
(Mech.) A curved sheath or breasting for a revolving cylinder or roll.






Collaborative International Dictionary of English 0.48








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"Concave" Quotes from Famous Books



... generally speared in the night time by boat, the spawning ground, generally a gravel bank near the shore, being the seat of operations. A fire of pitch pine and birch bark is ignited on an elevated "jack" in the bow of the boat, the "jack" consisting of an ox-muzzle, or other concave wire contrivance [Page 240] which will hold the inflammable materials. This is secured to a post or crotched stick, as a prop, and the spearman stands near the burning mass with his spear in readiness. As his companion in the stern ...
— Camp Life in the Woods and the Tricks of Trapping and Trap Making • William Hamilton Gibson

... in the "Kondukwe" or in the Ojo. The latter, literally meaning a torch, is a polished cow-horn, closed at the thick end with wood, and banded with metal; a wooden stem, projecting from the upper or concave side, bears a neat "chillam" (bowl), either of clay or of brown steatite brought from the upper Gaboon River. This rude hookah is half filled with water; the dried hemp in the bowl is covered with what Syrians call a "Kurs," a bit of metal about the size of half-a-crown, ...
— Two Trips to Gorilla Land and the Cataracts of the Congo Volume 1 • Richard F. Burton

... should be made concave, and terminate in a trough to catch the gravy and keep the fat from dropping into the fire and making a smoke, which ...
— The Cook's Oracle; and Housekeeper's Manual • William Kitchiner

... the street till he came to the dark stairway of a little public hall over a feed-store. He ascended the steps with a respectful tread and entered the hall. It was furnished with crude unpainted benches and lighted by kerosene lamps in concave-mirrored brackets on the white walls. At the end stood a table holding a pitcher of water, a goblet, and a Bible, and behind the table sat an earnest-eyed, middle-aged evangelistic preacher, who bowed and smiled in agreeable surprise ...
— Dixie Hart • Will N. Harben

... worth was thumped upon the counter, and they returned, bearing it like a streamer to the coffin. While the noise of their hammers filled the room, the hearse came tottering to the door, pulled and pushed by twenty men. It was an ambulance left behind by the soldiers, and of the old-fashioned shape, concave in body, its top blown away in winds of long ago; and as they revolved, its wheels dished in and out like hoops about to fall. While some made a harness from ropes, and throwing the saddles off two ponies backed them to the vehicle, ...
— Lin McLean • Owen Wister

... formed an abutment to the edifice, all on one side of it being ancient, and the other modern. It was lighted by one narrow, high, Gothic window, the panes of which were very small, lozenged, and many of them still stained. The roof was groined and concave, and still gay with tarnished gold. The mouldings and traceries sprang up from the four corners, and all terminated in the centre, in which grinned a Medusa's head, with her circling snakes, in high preservation, and of great ...
— Rattlin the Reefer • Edward Howard

... raised them to his breast, Around the joyful Mercians prest, And made their shouts of triumph rise, To the fair concave ...
— Elegies and Other Small Poems • Matilda Betham

... people. Among both the land was divided per capita among the people; in Judea a new division was made every fifty years. The Peruvians renewed every year all the fires of the kingdom from the Temple of the Sun, the new fire being kindled from concave mirrors by the sun's rays. The Romans under Numa had precisely the same custom. The Peruvians had theatrical plays. They chewed the leaves of the coca mixed with lime, as the Hindoo to-day chews the leaves of the betel mixed with lime. Both the American and European nations ...
— The Antediluvian World • Ignatius Donnelly

... of these together and put them away in a shady place to dry. After a week or more, preferably several months, he selected the best shafts and straightened them. This he accomplished by holding the concave surface near a small heap of hot embers and when warm he either pressed his great toe on the opposite side, or he bent the wood backward on the base of the thumb. Squinting down its axis he lined up the uneven contours one after the ...
— Hunting with the Bow and Arrow • Saxton Pope

... the direction of our route, and the pond we had just left was ascertained to be the only one in the little channel. I sought a good position for a depot camp on the newly-discovered river, and found one extremely favourable, on a curve concave to the N. W., overlooking, from a high bank, a dry ford, on a smooth rocky bed; and having also access to a reach of water, where the bottom was hard and firm. We approached this position with our carts, in the midst of smoke and flame; the natives having availed ...
— Journal of an Expedition into the Interior of Tropical Australia • Thomas Mitchell

... instruments, were distributed through the chambers. The third story, save two bed-chambers,—one for the housekeeper, the other for the footman,—had been fitted up for an observatory. The lenses and achromatic glasses, tubes and specula, concave mirrors, and object-prisms, and the huge, rough old telescope, peering through the roof, were still there as their owner had left them. All appliances of housekeeping were absent, and Cavendish House was destitute of all comforts, for which ...
— Prairie Farmer, Vol. 56: No. 3, January 19, 1884. - A Weekly Journal for the Farm, Orchard and Fireside • Various

... mounting through a stagnant calm in a line almost vertical, had pierced the morning mists, and now swam emancipated in a heaven of exquisite blue. Below us, by some trick of eyesight, the country had grown concave, its horizons curving up like the rim of a shallow bowl—a bowl heaped, in point of fact, with sea-fog, but to our eyes with a froth delicate and dazzling as a whipped syllabub of snow. Upon it the travelling shadow of the balloon became no shadow but a stain: an amethyst (you might call it) ...
— The Works of Robert Louis Stevenson - Swanston Edition Vol. 20 (of 25) • Robert Louis Stevenson

... helicoidal or screw-shaped spiral, the rings of which, rising one over the other, occupy nearly the whole of the height of the tank. Before again issuing from it, this spiral runs into a small cone with a concave base, that is turned downward in the shape of a ...
— Five Weeks in a Balloon • Jules Verne

... through my magnifying glass. You see that the fang is hollow from the base to the point, from the former the poison is pressed up out of the poison-bag and exudes through the fang point, which, as you see, is in the form of a narrow slit on its concave side." ...
— With Axe and Rifle • W.H.G. Kingston

... centres, two placed within the arch on a level with the spring, and two placed on the exterior of the arch, and level with the apex or point (fig. 8); each side is composed of a double curve, the lowermost convex and the uppermost concave. ...
— The Principles of Gothic Ecclesiastical Architecture, Elucidated by Question and Answer, 4th ed. • Matthew Holbeche Bloxam

... concourse of people assembled, and thus was tempted, soon after leaving the ground, to dive up into a huge black cloud of peculiarly forbidding aspect. This cloud appeared to remain stationary while he swept beneath it, and, having reached its central position, he observed that its under surface was concave towards the earth, and at that moment he became swept upwards in a vortex that set his balloon spinning and swinging violently, while he himself was afflicted with violent nausea and a feeling of suffocation. The cold experienced now became intense, and the cordage became glazed ...
— The Dominion of the Air • J. M. Bacon

... in which thirteen pieces or dice were used. Nine of them were of bone and were fashioned in figures typifying fish, serpents, etc. One side of each was painted red and had dots burned in with a hot iron. The brass pieces were circular having one side convex and the other concave. The convex side was bright, the concave dark or dull. The red pieces were the winning pieces and each had an arithmetical value. Any number of players might play. A wooden bowl, curiously carved and ornamented, ...
— Indian Games • Andrew McFarland Davis

... for the strong, firm hold on my arm, I could not have stood it. As it was I dared not think. Suddenly we turned a sharp angle and found ourselves in a curious semicircular place, almost level and fifty or sixty feet deep in the concave, as if a great piece had been gouged out of the mountain by the glacier which must once ...
— Elsket - 1891 • Thomas Nelson Page

... FAM. RANIDAE.—Tongue nearly circular, entire; palate concave, with two groups of palatine teeth between the orifices of the internal nostrils; jaw toothed; head smooth, high on the side; mouth large; eyes convex, swollen above, tympanum scarcely visible; back rather convex, high on the sides; skin smooth, not porous; limbs rather ...
— Journals Of Expeditions Of Discovery Into Central • Edward John Eyre

... killed by immersion in boiling water, which causes them to swell to twice their natural size, and are then dried and packed for market. The insects shrivel in drying, and assume the form of irregular grains, fluted and concave. The best sorts have a silvery-grey colour, with a purplish reflection, and seem to be dusted with a white powder. This appearance is often given by means of heavy spar, carbonate of lead, Venice talc, &c. A good lens, however, will ...
— Field's Chromatography - or Treatise on Colours and Pigments as Used by Artists • George Field

... As many as ten or more are worn by one woman. These disks are made by men, who may be called "jewelers to the tribe," from silver quarters and half dollars. The pieces of money are pounded quite thin, made concave, pierced with holes, and ornamented by a groove lying just inside the circumference. Large disks made from half dollars may be called "breast shields." They are suspended, one over each breast. Among the disks other ornaments are often suspended. One young woman I noticed ...
— The Seminole Indians of Florida • Clay MacCauley

... examine the maps of monthly isothermals, we observe how strikingly those lines change, becoming convex to the north as summer approaches, and concave as winter. They by no means observe a parallelism to the mean, but change their flexures, assuming new sinuosities. In their absolute transfer they move with a variable velocity, and through spaces far from insignificant. The line of 50 deg. F., which in January passes through ...
— History of the Intellectual Development of Europe, Volume I (of 2) - Revised Edition • John William Draper

... is ready for printing, the prepared side is usually concave. It is straightened by slightly wetting the back and resting it on one end, prepared side against ...
— Photographic Reproduction Processes • P.C. Duchochois

... diameter, and very even; these I fix very strongly together by the help of very hard Cement, and then fit the whole Glass ABCDEF into a long Board, or Frame, in such manner, that almost half the head AB may lye buried in a concave Hemisphere cut into the Board RS; then I place it so on the Board RS, as is exprest in the first figure of the first Scheme; and fix it very firm and steady in that posture, so as that the weight of the Mercury that ...
— Micrographia • Robert Hooke

... portion a faint, unearthly glow clung close, the result of the terrific friction of the ascent. In miniature, in the regular screens, was Satellite III, but a distorted miniature, for its half-face appeared concave in shape, and dusted with the haze ...
— The Passing of Ku Sui • Anthony Gilmore

... her husband. He was perhaps twenty-five years younger; a quarter-century less soaked in hideousness. Her yellow, concave-sided teeth were bared at him, her mouth drew up on one side above the gums. "Pete, if I hear one word more out of you, out you go. Lady! Huh! Where d' you come ...
— Free Air • Sinclair Lewis

... longer in the hall. He was marching along a gallery overhanging one of the great streets of the moving platforms that traversed the city. Before him and behind him tramped his guards. The whole concave of the moving ways below was a congested mass of people marching, tramping to the left, shouting, waving hands and arms, pouring along a huge vista, shouting as they came into view, shouting as they passed, shouting as they receded, until the globes of electric light receding ...
— The Sleeper Awakes - A Revised Edition of When the Sleeper Wakes • H.G. Wells

... heavens; the glories of night dissolved into the glories of the dawn. The blue sky now turned more softly gray; the great watch-stars shut up their holy eyes; the east began to kindle. Faint streaks of purple soon blushed along the sky; the whole celestial concave was filled with the inflowing tides of the morning light, which came pouring down from above in one great ocean of radiance; till at length, as we reached the Blue Hills, a flash of purple fire blazed out ...
— Choice Specimens of American Literature, And Literary Reader - Being Selections from the Chief American Writers • Benj. N. Martin

... at every glance the whole seeming concave of the visible world; it quails before so vast an outlook, it is tortured by distance; yet there is no rest or shelter till the man runs into his cabin, and can repose his sight upon things near at hand. Hence, I am told, a sickness of the vision ...
— Across The Plains • Robert Louis Stevenson

... ranges, with their entablature and beautiful arches, whereby the body of the church and choir are divided into three parts or aisles. The roof of each is adorned with arches and spacious peripheries of enrichments, as shields, leaves, chaplets, &c. (the spaces included being somewhat concave), admirably carved in stone; and there is a large cross aisle between the north and south porticoes, and two ambulatories, the one a little eastward, the other westward from the said cross-aisle, and running parallel therewith. The floor of the whole is paved with ...
— London in 1731 • Don Manoel Gonzales

... the wind." The Scottish "herdsman" on the lonely mountain-top "feels the presence and the power of greatness," and "in its fixed and steady lineaments he sees an ebbing and a flowing mind." The philosopher[128] lifts his eyes to "the starry heavens" in all the depth of their concave, and with all their constellations of glory moving on in solemn grandeur, and, to his mind, these immeasurable regions seem "filled with the splendors of the Deity, and crowded with the monuments of his power;" or he turns his eye to "the Moral ...
— Christianity and Greek Philosophy • Benjamin Franklin Cocker

... then, I am alone, And this is solitude, "I murmured low, As in the presence of the risen storm I bowed my head abashed. "Alone?"— The echoing concave of the skies replied,— "Alone?"—the waves responded, and the winds In hollow ...
— Poems of the Heart and Home • Mrs. J.C. Yule (Pamela S. Vining)

... measurer and divider by length or tension of string into given notes; and I believe it is, in a double connection with its office as a measurer of time or motion and its relation to the transit of the sun in the sky, that Hermes forms it from the tortoise-shell, which is the image of the dappled concave of the cloudy sky. Thenceforward all the limiting or restraining modes of music belong to the Muses; but the more passionate music is wind music, as in the Doric flute. Then, when this inspired music ...
— The Queen of the Air • John Ruskin

... gradually darker to the point; the points of the spines on the back are very dark, being of a blackish-brown colour. The long and stout bristles, which are mixed with the spines on the back, are similarly coloured" (Waterhouse, 'Mammalia,' vol. ii. p. 472). The spines are flat on the under-surface and concave on the upper, sharply pointed and broadest near the root. Mixed with the spines on the back are long bristles, very stout, projecting some three inches beyond the spines, which are only about an inch in length; below these is a scanty undergrowth of pale coloured ...
— Natural History of the Mammalia of India and Ceylon • Robert A. Sterndale

... the earth it is chiefly produced by fire and flame, which without doubt contain bodies in rapid motion, for they dissolve and melt numberless other bodies. Or, if one considers its effects, one sees that light collected, for instance, by a concave mirror has the power to heat like fire, i.e. to separate the parts of the bodies; this assuredly points to movement, at least in true philosophy in which one traces all natural activity to mechanical causes. In my opinion ...
— Man or Matter • Ernst Lehrs

... effect is easily explained on scientific grounds. It arose from the concave form of the gallery and the conducting power of the rock. There are many examples of this propagation of sounds which remain unheard in the intermediate space. I remember that a similar phenomenon has been observed in many places; amongst others on the internal surface of the ...
— A Journey to the Interior of the Earth • Jules Verne

... more stately sister, the Hoch Gall, a mountain deservedly the especial pride of the district, its lofty pinnacle piercing the sky, whilst a vast sheet of thick, pure snow hung straight and smooth down its concave sides, a huge mountain-buttress linking the lower portion of this snow pyramid to the white, glittering expanse of the Gross Lengstein Glacier—a buttress of many thousand feet, standing prominently forth like an antediluvian monster, ...
— Lippincott's Magazine of Popular Literature and Science, Vol. XII, No. 29. August, 1873. • Various

... point of the earth and look up, the heavenly bodies appear as though they were situated upon the surface of a vast hollow sphere, of which your eye is the center. Of course this apparent concave vault has no existence and we cannot accurately measure the distance of the heavenly bodies from us or from each other. We can, however, measure the direction of some of these bodies and that information is of tremendous value to us in ...
— Lectures in Navigation • Ernest Gallaudet Draper

... or semi-circular at the top, flat on the underside, and when the garnet is so cut it is called a carbuncle. In strongly coloured stones, while the upper surface is semi-circular like the cabochon, the under surface is more or less deeply concave, sometimes following the curve of the upper surface, the thickness of the stone being in that case almost parallel throughout. This is called the "hollow" cabochon. Other stones are cut so that the upper surface is dome-shaped like the ...
— The Chemistry, Properties and Tests of Precious Stones • John Mastin

... from the assault by Colonel De Courcey was justified by the failure of the corps of A. J. Smith, and the command of Colonel Lindsey, to advance simultaneously to the assault. Both had the same difficulties to encounter —impassable bayous. The enemy's line of battle was concave, and De Courcey advanced against his centre—hence he sustained a concentric fire, and the withdrawal of Steele from the front of the enemy's right on the 28th ult. enabled the enemy on the following day to concentrate ...
— Memoirs of Three Civil War Generals, Complete • U. S. Grant, W. T. Sherman, P. H. Sheridan

... numbing in its vastness. This was the concave, inner surface, doubtless deep within the atom of some material substance. A little empty Space here, ...
— The World Beyond • Raymond King Cummings

... severance from them would, if it were indeed possible, destroy our own existence. Our so-called intensive life is conditioned by the extensive; the former is only a reflex of the latter, in which the figures and images received, as if reflected in a concave mirror, often appear in changed relations that are wonderful and singularly strange, notwithstanding that these caricatures again And their real originals in life. I boldly maintain, that no man has ever thought or dreamt anything the elements ...
— Weird Tales, Vol. II. • E. T. A. Hoffmann

... the depredations of animals. During the following day we completed our work upon Chinantecs. The type is one of the best marked. In the child, the nose is wide, flat at the tip, with a straight or even concave bridge; the eyes are widely separated and often oblique; the mouth is large, the lips thick and the upper lip projects notably beyond the lower; the face is wide, and flat at the cheek-bones. With age, this type changes, the nose ...
— In Indian Mexico (1908) • Frederick Starr

... woman, had thus chanted to her comity, the chorus straightway shrills with trembling tongues, the light tambour booms, the concave cymbals clang, and the troop swiftly hastes with rapid feet to verdurous Ida. Then raging wildly, breathless, wandering, with brain distraught, hurrieth Attis with her tambour, their leader through dense woods, like an untamed heifer shunning the ...
— The Carmina of Caius Valerius Catullus • Caius Valerius Catullus

... its wide-spreading and concave hoofs the Woodland caribou does not have to "yard" as other deer do in winter time, for thus provided with natural snowshoes, the caribou can pass over the deepest snow with little trouble. Also, throughout the year ...
— The Drama of the Forests - Romance and Adventure • Arthur Heming

... flame fluttered like a silk flag, throwing an angry swaying glare mingled with moving shadows over the poop, lighting up the concave surfaces of the sails, gleaming on the wet paint of the white rails. And young Powell turned his eyes to windward with a ...
— Chance • Joseph Conrad

... summit of Hill 200. But between these two positions the Germans had retained a strong system of trenches forming a salient almost triangular in shape, which the French nicknamed "la Poche" (the Pocket). During the whole year a war of mining had been going on, and the region, which was broken up by concave constructions and intersected in all directions by trenches and alleys of communication, constituted an attacking ground all the more difficult because to the north of la Poche the rather thickly-wooded Trou Bricot, the edges of which ...
— The Story of the Great War, Volume IV (of 8) • Francis J. (Francis Joseph) Reynolds, Allen L. (Allen Leon)

... the very minutest point of black was visible at the centre of the grey iris. Nor was this the only abnormal peculiarity of the sick man's eyes. As he lay on his back, the right iris sagged down slightly towards its centre, showing a distinctly concave surface; and, when I contrived to produce a slight but quick movement of the eyeball, a perceptible undulatory movement could be detected. The patient had, in fact, what is known as a tremulous iris, a condition that is seen in cases where the crystalline lens has been extracted for the cure of ...
— The Mystery of 31 New Inn • R. Austin Freeman

... by this time presented not a convex line, but a concave, either wing having gradually advanced a little in consequence of the repeated repulses of the enemy. They were now formed in an unbroken array, four deep, and poured on the approaching columns (each man firing as often ...
— The History of Napoleon Buonaparte • John Gibson Lockhart

... a simple amateur. He took it into his head to go up a third time. He wished to attempt a descent in a parachute of his own construction, which he believed was vastly superior to the ordinary one. He altered the form altogether, though that form had been proved to be satisfactory. In place of a concave surface, supporting itself on a volume of air, Cocking used an inverted cone, of an elaborate construction, which, instead of supporting him in the air, only accelerated his fall. Unhappily, Green participated in ...
— Wonderful Balloon Ascents - or, the Conquest of the Skies • Fulgence Marion

... minutes and then clamping them over a form of the proper shape, with a piece of stiff sheet iron on the outside, as in Fig. 299. They should be thoroly dried in a warm place. Then the tenons may be laid out on the ends parallel to a straight-edge laid along the concave side. The chair bottom may be made of solid wood, either flat or modeled into a "saddle seat;" it may be covered with cane or rush, ...
— Handwork in Wood • William Noyes

... light began to run along the sky. We sat very still, knowing what was coming to pass. In a minute more we saw a ruddy rim rise out of purple dusk; and with that almost incredible quickness in which the miracle is accomplished, the whole moon was up, red and slightly concave, for ...
— The Lightning Conductor Discovers America • C. N. (Charles Norris) Williamson and A. M. (Alice Muriel)

... I have found the comfortable, convex and concave characters often really more difficult in the long run. You must have some hard and durable rock on which to found understanding and security. The soft, crumbling people may be lovable; but they are useless as sand at a crisis. They are always slipping away ...
— The Spinners • Eden Phillpotts

... the round, somewhat concave, scars, found terminating the stem where forking occurs, or seemingly in the axils of branches, on account of one of the forking branches growing more rapidly and stoutly than the other and thus taking the place ...
— Outlines of Lessons in Botany, Part I; From Seed to Leaf • Jane H. Newell

... flour the millstones are abandoned, except for finishing some of the inferior grades of flour, and the work is done by means of grooved and plain rollers, made of chilled iron or porcelain. In some cases disks of chilled iron, suitably furrowed, are used, and in others concave mills, consisting of a cylinder running against a concave plate. In Minneapolis the chilled iron rolls take the precedence of ...
— Scientific American Supplement No. 275 • Various

... hair, and her visible presence would scarcely add to the wonders in this under-world of glamour and mystery. Shells, pink and pearly, brown and lilac, scarlet and cobalt, strew the flower-decked floor with infinite variety, concave and spiral, ribbed and fluted, fretted and jagged—the satin smoothness of convoluted forms lying amid rugged shapes bristling with spines and needles. We gaze almost with awe at the lovely vision of a dainty Nautilus, sailing his fairy boat down a blue channel fringed ...
— Through the Malay Archipelago • Emily Richings

... entirely constructed of limestone from neighboring mountains. The blocks are small and badly cut, the stone courses being concave, to offer a better resistance to downward thrust and to shocks of earthquake. When breaches in the masonry are examined, it can be seen that the external surface of the steps has, as it were, a double ...
— The Great Events by Famous Historians, Vol. 1 • Various

... In the farther end of the tube gleamed a lump of yellow metal, which I took to be gold. Hall and I were seated near another table about twenty-five feet distant from the tube, and on this table was an apparatus furnished with a concave mirror, whose optical axis was directed towards the tube. It occurred to me at once that this apparatus would be suitable for experimenting with electric waves. Wires ran from it to the floor, and in the cellar beneath was audible ...
— The Moon Metal • Garrett P. Serviss

... their beginning; for the last he spake Agreed not with the first. But not the less My fear was at his saying; sith I drew To import worse perchance, than that he held, His mutilated speech. "Doth ever any Into this rueful concave's extreme depth Descend, out of the first degree, whose pain Is deprivation merely of sweet hope?" Thus I inquiring. "Rarely," he replied, "It chances, that among us any makes This journey, which I wend. Erewhile 'tis true ...
— The Divine Comedy • Dante

... already grown cool; snow had appeared on the mountain peaks; the basin was no longer a great green bowl, but resembled a mammoth, concave palette upon which nature had mixed her colors—yellow and gold and brown, with here and there a blotch of red and purple, a dash of green,—lingering over the season—and great, wide stretches of gray. The barren spots seemed to grow more barren—mocked by the scarlet blossoms of the cactus ...
— The Coming of the Law • Charles Alden Seltzer

... consists. This leads to a classification of the parts of the soul. The first distribution is, into Rational and Irrational; whether these two are separable in fact, or only logically separable (like concave and convex), is immaterial to the present enquiry. Of the irrational, the lowest portion is the Vegetative [Greek: phytikon], which seems most active in sleep; a state where bad men and good are on a par, and which is incapable of any human excellence. The ...
— Moral Science; A Compendium of Ethics • Alexander Bain

... the front set of wings of the dragon fly, was the large, main plane, with the concave turn toward the ground. There was the usual propeller in front, operated by a four cylinder motor, the cylinders being air cooled, and set like the spokes of a wheel around the motor box. The big gasolene tank, and other mechanism was in front of the right-hand ...
— Tom Swift and his Wireless Message • Victor Appleton

... their lines were to gain as much distance as possible. From the base of the hill at Taylor's Creek they began digging a tunnel one hundred and seventy yards long, and at its terminus were two laterals, dug in a concave towards our works, of thirty-seven feet each. In these laterals were placed eight hundred pounds of powder, with fuse by which all ...
— History of Kershaw's Brigade • D. Augustus Dickert

... of the Pauillac opened up the concave of the sand and brought its whole length to view, Stern and the girl ...
— Darkness and Dawn • George Allan England

... the immense observatory and of the telescope is of American production, with the single important exception of the cast glass disc from which the two principal lenses, the one double convex and the other plano-concave, are produced. These were cast by Mantois, of Paris, whose superiority to the American manufacturers of optical glass ...
— Notable Events of the Nineteenth Century - Great Deeds of Men and Nations and the Progress of the World • Various

... inner surface of the chest walls and the outer surface of the lungs, are in the closest contact. This is so whatever the changes that take place in the size and shape of the chest. The lungs are concave below, and so fit accurately to the fleshy partition between the chest and the abdomen which constitutes the lower boundary of the chest, if we may use the term "chest" somewhat loosely. Above, suiting the shape of the chest, ...
— Voice Production in Singing and Speaking - Based on Scientific Principles (Fourth Edition, Revised and Enlarged) • Wesley Mills

... a slight pinch between the thumb and finger at the end of the tendril of the Cucurbitaceae causes prompt movement, but a pinch excites no movement in Cissus. The cause is that one side alone (the concave) is irritable in the former; whereas both sides are irritable in Cissus, so if you excite at the same time both OPPOSITE sides there is no movement, but by touching with a pencil the two branches of the tendril, in any part whatever, you cause movement ...
— The Life and Letters of Charles Darwin, Volume II • Francis Darwin

... portion of the nave. It was a vast old edifice, spacious enough, within the extent covered by its pillared roof and overspread by its stone pavement, to accommodate the whole of church-going London, and with a far wider and loftier concave than any human power of lungs could fill with audible prayer. Oaken benches were arranged in the transept, on one of which I seated myself, and joined, as well as I knew how, in the sacred business that was going forward. But when it came to the sermon, the voice of the preacher was puny, ...
— Our Old Home - A Series of English Sketches • Nathaniel Hawthorne

... feet in diameter and extended from ceiling to floor; some of the latter were but a few feet high from the floor; but the formation is going on constantly, and many centuries hence these stalagmites will extend to the ceiling and become complete columns. The stalagmites were all a little concave, and the cavities were filled with water. The water percolates through the roof, a drop at a time—often the drops several minutes apart—and more or less charged with mineral matter. Evaporation goes on slowly, leaving the mineral behind. This in time makes the immense columns, many ...
— Personal Memoirs of U. S. Grant, Complete • Ulysses S. Grant

... among the weedy stones at the bottom of the sea. Of all living creatures the jelly fish alone seemed to retain any spirit. Immense crowds of them drifted past the Tortoise, swelling out and closing again their concave bodies, revolving slowly round, dragging long purple tendrils deliriously through the warm water. They swept past Priscilla's drooping hands, touching them with their yielding bodies and brushing them softly with their tendrils. Now and then she lifted one from the water, ...
— Priscilla's Spies 1912 • George A. Birmingham

... by any weight, applied transversely, to a beam supported at both ends, is directly as the breadth, and square of the depth, and inversely as the length. It causes the beam to be depressed towards the middle of its length, forming a curve, concave to the horizontal and below it. In assuming this form—the fibres of the upper part of the beam are compressed, and those of the lower part are extended—consequently there must be some line situated between the upper and ...
— Instructions on Modern American Bridge Building • G. B. N. Tower

... This he banked up with stones until he had a small oven. By arching the stones over toward the top there was left a sort of circular opening. Over this Jack fitted a monster clam shell, with the concave side uppermost. ...
— Under the Ocean to the South Pole - The Strange Cruise of the Submarine Wonder • Roy Rockwood

... which have a flange on one edge, it is necessary to add not only the thickness of the tire, but also two thirds of the depth of the flange; generally, however, the tire bars are sent from the forge so curved that the plain edge of the tire is concave, and the flange edge convex, while the side which is afterward to be bent into contact with the cylindrical surface of the wheel is a plane. In this case the addition of the diameter of two thirds of the depth of the flange is unnecessary, ...
— A Catechism of the Steam Engine • John Bourne

... we have directed John to repair the Cloacae of the City, those splendid works which strike astonishment into the hearts of all beholders. There you see rivers as it were shut in by concave mountains, flowing down through mighty rafters[297] (?). There you see men steering their ships with the utmost possible care, lest they should suffer shipwreck. Hence may the greatness of Rome be inferred. What other city can compare with her in her heights ...
— The Letters of Cassiodorus - Being A Condensed Translation Of The Variae Epistolae Of - Magnus Aurelius Cassiodorus Senator • Cassiodorus (AKA Magnus Aurelius Cassiodorus Senator)

... exactly that the weakest hand can turn it. It is hooped round with a hollow cylinder of adamant, four feet yards in diameter, placed horizontally, and supported by eight adamantine feet, each six yards high. In the middle of the concave side, there is a groove twelve inches deep, in which the extremities of the axle are lodged, and turned round as ...
— Gulliver's Travels - into several remote nations of the world • Jonathan Swift

... woman is not to be judged by exceptions, nor is she to be measured by the standard of public sentiment. Public sentiment has often condemned the right. It ridiculed Columbus; put Roger Bacon in jail because he discovered the principle of concave and convex glass; condemned Socrates, and jeered Fulton and Morse. It pronounced the making of table forks a mockery of the Creator who gave us fingers to eat with, and broke up a church in Illinois because a woman prayed in ...
— Wit, Humor, Reason, Rhetoric, Prose, Poetry and Story Woven into Eight Popular Lectures • George W. Bain

... "that upper lens is concave so that it enlarges tremendously. I can do some wonderful tricks ...
— The War Terror • Arthur B. Reeve

... spouse; A gem-blaz'd circle beaming on her brows. Hail'd with acclaim among the heav'nly choirs, Her soul new-kindling with seraphic fires, To notes divine she tunes the vocal strings, While heav'n's high concave with the music rings. Virtue's rewards can mortal pencil paint? No—all descriptive arts, and eloquence are faint; Nor canst thou, Oliver, assent refuse To heav'nly tidings from the Afric muse. As soon may change thy laws, eternal fate, As the saint miss ...
— Religious and Moral Poems • Phillis Wheatley

... five rectangles, on the floor, was a large plate of transparent substance, ground to a concave surface, through which one could see an intricate tangle ...
— Hellhounds of the Cosmos • Clifford Donald Simak

... on the holy pile. I went in and walked down the aisle, listening for awhile to the grand choral, while the clustered tapers under the dome quivered and trembled, as if shaken by the waves of music which burst continually within its lofty concave. ...
— Views a-foot • J. Bayard Taylor

... children. The roofing of this little ranch and its out-houses was most interesting. It was carried out entirely with trunks of palm trees. These, split in half and cleared of all sap, made very effective roofing, placed alternately in concave and convex form, so that the ridges of the two lengths of trunk placed bark upward rest in the hollow of the intervening trunk. Naturally, all rain water drains off the convex half into the concave trunk and ...
— Argentina From A British Point Of View • Various

... on the hand it will be found that it is still cool. The fact is that the water never touches the hot iron at all, provided the heat is sufficiently intense, but assumes a slightly elliptical shape and is supported by a cushion of vapor. If, instead of a flat-iron, we use a concave metal disk about the size and shape of a watch crystal, some very interesting results may be obtained. If the temperature of the disk is at, or slightly above, the boiling point, water dropped on it from ...
— The Miracle Mongers, an Expos • Harry Houdini

... a common bird in the interior during the summer. Gregarious, and building clay nests, like bottles stuck against a tree, in rows one above the other. Instinct guides these little birds to select a tree that slopes and is concave, in which the nests will be protected from rain or storms. A white-headed swallow was also frequently seen, but it was always under circumstances that prevented ...
— Expedition into Central Australia • Charles Sturt

... walked along the beach in the direction of the tower. His feet, shod in hempen sandals, crunched on the gravel at the edge of the wash from the surf. Among the azure pebbles were fragments of pottery; portions of earthen handles; concave pieces of bowls bearing vestiges of decoration, which had, perhaps, belonged to swelling urns; small, irregular spheres of gray clay in which one seemed to make out, despite the corrosion of the salt water, human features worn by the passing centuries. They ...
— The Dead Command - From the Spanish Los Muertos Mandan • Vicente Blasco Ibanez

... They started at the edge of the field to the left where a rank growth of shrubby weeds gave shelter for the snow to pile in. Their base, alongside the fence, was broad, and they tapered across the road, with a perfectly flat top, and with concave sides of a most delicate, smooth, and finished looking curve, till at last they ran out into a sharp point, mostly beyond the road on the ...
— Over Prairie Trails • Frederick Philip Grove

... fast the blade of the sword, it is bound across with several stout strips of rattan which are laced closely to the wood with finer strips. The handle, carved out of the same solid block of wood as the body of the shield, is in the middle of the concave surface; it is a simple vertical bar for the grasp of the left hand. The Kayan shield is commonly stained red with iron oxide, and touched up with black pigment, ...
— The Pagan Tribes of Borneo • Charles Hose and William McDougall

... Harvest Moon. Upon the folds of the rolling prairie, upon the round tops of the hills, upon the broad valleys, and upon the far-away peaks in the west the white light lay thick and soft like a mantle. Above the white-mantled world the concave of the sky hung blue and deep and pricked out with pale star points. About the world the night had thrown her mystic jewelled robes of white and blue, making a holy shrine, a very temple of peace for God ...
— The Major • Ralph Connor

... the isochronism of the pendulum, followed by Huyghens's adaptation of that principle to clocks, has been one of the greatest aids to accurate observation. About the same time an equally beneficial step was the employment of the telescope as a pointer; not the Galilean with concave eye-piece, but with a magnifying glass to examine the focal image, at which also a fixed mark could be placed. Kepler was the first to suggest this. Gascoigne was the first to use it. Huyghens used a metal strip of variable width ...
— History of Astronomy • George Forbes

... they measured from 6 to 10 inches in diameter. Three other rows cross the Costa in the same neighbourhood separated by a few hundred yards and as they lie at right angles to the stream which there forms a concave bend, they appear to converge upon one point. This would be what may roughly be termed an island between the Costa and a large drain where water in ancient times probably accumulated ...
— The Evolution Of An English Town • Gordon Home

... deepening the shadows about the doorways and under the frequent arches. I remember distinctly among the beautiful nights of that time, the soft night of late winter which first showed me the scene you may behold from the Public Gardens at the end of the long concave line of the Riva degli Schiavoni. Lounging there upon the southern parapet of the Gardens, I turned from the dim bell-towers of the evanescent islands in the east (a solitary gondola gliding across the calm of the water, and striking its moonlight silver into multitudinous ...
— Venetian Life • W. D. Howells

... at work to devise another kind of telescope. In the new form, called the Reflecting Telescope, or "Reflector," the light coming from the object under observation was reflected into the eye-piece from the surface of a highly polished concave metallic mirror, or speculum, as it was called. It is to Sir Isaac Newton that the world is indebted for the reflecting telescope in its best form. That philosopher had set himself to investigate the causes of the rainbow-like, or prismatic colours which for a long time ...
— Astronomy of To-day - A Popular Introduction in Non-Technical Language • Cecil G. Dolmage

... flowers, Far stretched the dale of Balder with its sighing groves. Its song of birds, a home where peace might reign supreme. High rose the copper-bolted portal, and within Two colonnades supported on strong omoplates The vaulted canopy, and beautiful it hung Above the temple, like a concave shield of gold. At farthest end stood Balder's altar. It was hewn From one huge block of northern granite: round it coiled A graven serpent, covered o'er with written runes, - Profoundest thoughts from Vala and from Ha'vama'l; But in the wall above was left an open space,— ...
— Fridthjof's Saga • Esaias Tegner

... because it is near the heart. The other opening, by which the food leaves the stomach, and where the small intestine begins, is the pyloric orifice, and is guarded by a kind of valve, known as the pylorus, or gatekeeper. The concave border between the two orifices is called the small curvature, and the convex as the great curvature, ...
— A Practical Physiology • Albert F. Blaisdell

... identified and distinguished from those of the lower mammals. If the hair has been pulled out from the root, the microscope will show that the bulbous root has a concave surface which fitted over the hair papilla, or that the root is ...
— Aids to Forensic Medicine and Toxicology • W. G. Aitchison Robertson

... the building. In a moment afterwards, we were beneath the dome of St. Paul's. If this part of the edifice has appeared imposing when viewed from without, how much grander did it seem now that we stood on the marble pavement below, and gazed upward into the vast concave which the genius of Sir Christopher Wren had designed. The scene to my mind was most impressive, and the impressiveness was heightened by a continuous dull roar, which never ceased for a moment. This ceaseless ...
— Young Americans Abroad - Vacation in Europe: Travels in England, France, Holland, - Belgium, Prussia and Switzerland • Various

... and while sorcerers are enabled by means of their astrolabe to take the altitude of the sun, moon, and stars, I am satisfied merely by looking into people's faces, in order to see if their eyes are encircled with dark lines, and if the mouth describes a convex or concave arc." ...
— The Vicomte de Bragelonne - Or Ten Years Later being the completion of "The Three - Musketeers" And "Twenty Years After" • Alexandre Dumas

... heard of the arrest I started up myself with the finger-print records to help Burke. It was the same man, all right - I'll swear to that on a stack of Bibles. So will Burke. I'll never forget that snub nose - the concave nose, the nose being the first point of identification in the 'portrait park.' And the ears, too - oh, it was the same man, all right. But when we produced the London finger-prints which tallied with the New York finger-prints which we had made - believe it or ...
— The Poisoned Pen • Arthur B. Reeve

... Hansen and Lehmann in their experiments consists of two large concave reflectors. These are placed at a convenient distance, one facing the other, so that two experimenters may be seated, the first having his mouth at the focal point of one reflector, the second with his ear at the focal point of the other. As the first experimenter ...
— The Psychology of Singing - A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern • David C. Taylor

... deposited and the lake became silted up, i.e. it became so shallow that it was little more than a lake of mud. The same facts were brought out at the bend of the river. On its convex side, Fig. 55, the water has rather further to go in getting round the bend than on its concave side B, it therefore flows more quickly, and carries away the soil of the bank and mud from the bottom. But on its concave aide where it flows more slowly it deposits material. There is at the bend a marked difference in depth at the two sides. On its convex side ...
— Lessons on Soil • E. J. Russell

... folded inwardly above, pale magenta, veined with darker pink; upper part of interior crested with long white hairs. Stamens united with style into unsymmetrical declined column, bearing an anther on either side, and a dilated triangular petal-like sterile stamen above, arching over the broad concave stigma. Leaves: 2, from the base; elliptic, thick, 6 to 8 ...
— Wild Flowers Worth Knowing • Neltje Blanchan et al

... disc. Solder on the blade, using the minimum of solder needed to make a good joint. When all the blades are fixed, you will have a wheel with the blades quite true on one side. It is, therefore, important to consider, before commencing work, in which direction the concave side of the blades should be, so that when the wheel is mounted it ...
— Things To Make • Archibald Williams

... nutritive matter to exude from the vessels which permeate the periosteum. Nevertheless, the observations adduced by Mr. Spencer,[730] on the strengthening of the bowed bones of rickety children, along their concave sides, leads to the belief that this ...
— The Variation of Animals and Plants Under Domestication, Volume II (of 2) • Charles Darwin

... curved line. If they are then asked how they may know it is D, they will say, Because it is made of a perpendicular line and has a curved line behind. Further information may then be given. Turn the D letter up thus , and say, I want to teach you the difference between concave and convex: the under part of the curve is concave and the upper part of it is convex. Then say, I shall now take the letter away, and wish you to shew me concave and convex on one of your fingers; when they ...
— The Infant System - For Developing the Intellectual and Moral Powers of all Children, - from One to Seven years of Age • Samuel Wilderspin

... Earth's fairest glades And green savannahs—Earth has not a plain So boundless or so beautiful as thine; The eagle's vision cannot take it in. The lightning's wing, too weak to sweep its space, Sinks half way o'er it like a wearied bird;— It is the mirror of the stars, where all Their host within the concave firmament, Gay marching to the music of the spheres, ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 17, - Issue 493, June 11, 1831 • Various

... how Saturn wrecks, And bends, and corkscrews all the frame about, Doubles the hams, and crooks the straightest necks, Draws in the nape, and pushes forth the snout, Makes backs and stomachs concave or convex: Witness those pensioners called In and Out, Who all day watching first and second rater, Quaintly unbend themselves—but grow ...
— The Poetical Works of Thomas Hood • Thomas Hood

... can be made so by putting in front of the eye the proper kind of lens. There is nothing strange or mysterious about it. In some cases, the eye focuses the light before it reaches the retina. Such cases are known as nearsightedness and are corrected by having placed in front of the eyes concave lenses of the proper strength. These lenses diverge the rays and make them focus on the retina. In other cases, the eye is not able to focus the rays by the time they reach the retina. In these cases, the eyes need the help of convex lenses of the proper strength to make the ...
— The Science of Human Nature - A Psychology for Beginners • William Henry Pyle

... Paleface men with concave glasses, Learned in lore of printed pages, Dig into the mounds and gather Spear and arrow heads and axes, Broken weapons and utensils Made of ...
— The Legends of San Francisco • George W. Caldwell

... sun is by nature hot and not cold, as has already been stated. If rays of fire play on a concave mirror when it is cold, the rays refracted by the mirror will be hotter than {156} the fire. The rays emitted from a sphere of glass filled with cold water, which are reflected from a fire, will be warmer ...
— Thoughts on Art and Life • Leonardo da Vinci

... I was entitled to the arms of the vanquished; so, quickly dispatching him, and sawing off his Toledo, I bore it away for a trophy. It was three-sided, slightly concave on each, like a bayonet; and some three inches through at the base, it tapered from thence ...
— Mardi: and A Voyage Thither, Vol. I (of 2) • Herman Melville

... cells of the lower region of the thallus of many liverworts, as in the endotrophic mycorhiza of higher plants. Colonies of Nostoc are constantly found in the Anthocerotaceae and in Blasia. In the latter they are protected by special concave scales, while in the Anthocerotaceae they occupy some of the mucilage slits between the cells of the lower ...
— Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 - "Brescia" to "Bulgaria" • Various

... in an iron floor, and through this into the lantern. It was a neat building, with everything in apple-pie order, and no danger of anything rusting there for want of oil. The light consisted of fifteen argand lamps, placed within smooth concave reflectors twenty-one inches in diameter, and arranged in two horizontal circles one above the other, facing every way excepting directly down the Cape. These were surrounded, at a distance of two or three feet, by large plate-glass windows, which defied the storms, with iron sashes, ...
— The Atlantic Monthly, Volume 14, No. 86, December, 1864 • Various

... the apricots up, with the convex side uppermost, in a glass dish, reserving one cup apricot to go on the top, with the concave side uppermost. Take a few preserved cherries, and cut them in halves, and stick half a cherry in all the little holes or spaces where the apricots meet. Cut four little green leaves out of the angelica about the size ...
— Cassell's Vegetarian Cookery - A Manual Of Cheap And Wholesome Diet • A. G. Payne

... give a new form and color to the common and familiar objects it has printed in its still, pellucid depths. Every little basin of clear water by the roadside is a magic mirror, and transforms all that it encloses. There is a vastness of depth, too, in that concave hemisphere, through which the vision sinks like a falling star, that excites and fills the imagination. What it shows is only a shadow, but all things seen are mere shadows painted on the retina, and you have, ...
— Lippincott's Magazine Of Popular Literature And Science, No. 23, February, 1873, Vol. XI. • Various

... behind the western mountains, and the stars sparkled o'er the blue concave, we have been accustomed to sit down to the compilation of this unpretending volume, and therefore it is called "Eventide." O, that its pages might be read at that calm, silent hour,—their follies mercifully overlooked, their ...
— Eventide - A Series of Tales and Poems • Effie Afton

... the congested trees, writhing in some kind of agony private and eternal, made tenebrous and shifty silhouettes against the sky, like shapes cut out of black paper by a maniac who pushes them with his thumb this way and that, irritably, on a concave surface of blue steel. Resin oozed unseen from the upper branches to the trunks swathed in creepers that clutched and interlocked with tendrils venomous, frantic and faint. Down below, by force of habit, the lush herbage went through the farce of growth—that farce old and screaming, ...
— A Christmas Garland • Max Beerbohm

... too, offered to these metamorphosed gods was as much changed as the deities themselves; the altars assumed something of the Egyptian form, and the tabernacles were turned into shrines, which were decorated at the top with a concave groove, or with a frieze made up of repetitions of the uraeus. Egyptian fashions had influenced the better classes so far as to change even their mode of dealing with the dead, of which we find in not a few places clear evidence. Travellers ...
— History Of Egypt, Chaldaea, Syria, Babylonia, and Assyria, Volume 6 (of 12) • G. Maspero

... was a huge granite block, rotted from long exposure to the elements, seamed and scarred and cracked. The action of the eternally moving sand had worn an irregular-shaped concave into its southern wall, so that the summit overhung the side. The man on the summit was lying flat on his stomach, leaning far over, still shooting downward. The other man, who was standing at the base, was flattened against ...
— 'Drag' Harlan • Charles Alden Seltzer

... a mighty amphitheatre with solid rock walls shooting vertically hundreds of feet upward. Vertically, he thought—with the back of his head between his shoulders as he looked up—they were more than vertical—they were actually concave. The Almighty had not only stored riches immeasurable in the hills behind him—He had driven this passage Himself to help puny man to reach them, and yet the wretched road was going toward them like a snail. On the fifth ...
— The Trail of the Lonesome Pine • John Fox, Jr.

... cemented together; the number depending upon the size of the boat and the stiffness required. If linen paper is used, but one sheet is employed, of such weight and dimensions that, when dry, it will give just the thickness of skin necessary. Should the surface of the model be concave in parts, as in the run of boats with square sterns for instance, the paper is made to conform to these surfaces by suitable convex moulds, which also hold the paper in place until, by drying, it has taken and will retain the desired form. The model, ...
— Voyage of The Paper Canoe • N. H. Bishop

... to five feet deep. The front end of the beam is provided with a mud or stone boat to prevent sinking in the mud, and with a jack screw for regulating on uneven ground. Attached to it, and following the mole, is a carrier 200 feet long, made concave in form. On this the tile are laid and carried into the ground. A start is made at an open ditch or hole of required depth; when the carrier is drawn in full length a hole is dug just back of the coulter, two by three ...
— Prairie Farmer, Vol. 56: No. 4, January 26, 1884 - A Weekly Journal for the Farm, Orchard and Fireside • Various

... girl's mother and the big brothers stood on the edge of the timothy and viewed the concave stretch that should have showed green and waving from its rim to the boggy center, they planned the destruction of the rodents, and declared that if any escaped death by poison, the little girl should snare them and receive a cent for ...
— The Biography of a Prairie Girl • Eleanor Gates

... an adjoining cave. In many cases there are cisterns; in one is a well. The cisterns had to be filled laboriously. They are provided with bungholes for the purpose of occasional cleaning out. The walls are scored with concave grooves slanting downwards, uniting and leading into small basins. The moisture condensing on the sides trickled into these runnels and supplied the basins with drinking water. The mangers have holes bored in the stone through which ...
— Castles and Cave Dwellings of Europe • Sabine Baring-Gould



Words linked to "Concave" :   concaveness, patelliform, bowl-shaped, recessed, concave lens, acetabular, cupular, concave polygon, saucer-shaped, cuplike, biconcave, convexo-concave, pouchlike, urn-shaped, concavo-convex, concavo-concave, planoconcave, concave shape, cotyloidal



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