... sufficient to arouse alarm, but apparent in the listless behavior of the person, may be enough to suggest the beginning of the disease. An expert may detect the clogging up of the lung tissue by an examination of the lungs themselves, and probably this direct examination, with a record of the daily rise and fall of temperature, particularly if the suspected patient has a listless feeling and a gradual loss of weight, would be sufficient to suggest ... — Rural Hygiene • Henry N. Ogden
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