Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 240
d is very simple andexact, and free from this difificulty. It consists in fixing a fine point to thebody emitting the note, and causing it to trace the vibrations on a properlyprepared surface. The apparatus consists of a wood or metal cylinder, A (fig. 222), fixed toa vertical axis, O, and turned… … Fig. 222. the cylinder is rolled a sheet of paper covered with an inadhesive film oflampblack. On this film the vibrations register themselves. This is effectedas follows. Suppose the body emitting the note to be a steel rod. It is heldfirmly at one end, and carries, at the other, a fine point…
Physics
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