"Doorlock" Quotes from Famous Books
 ... iron or steel or tinned iron, by the earth's induction, becomes magnetic. Thus, if we examine our stoves, or a doorlock, or long vertical hinge, or even a high tin cup, by holding a delicate magnetic needle in the hand near those objects, we find the earth has, by induction, attracted to the lower end of the stove utensils, ...
— Scientific American Supplement, No. 430, March 29, 1884 • Various |
