Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 1028
feature of the instrument, a dia-phragm, D, of soft iron, called the tympanuvi, not much thicker than a sheetof stout letter-paper. This diaphragm is screwed down by the mouth-piece E,which is similar to, though somewhat larger than, that of a stethoscope. Two such in-struments are con-nected by…
Physics
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