Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 380
Tuning-Fork. one or two storage cells,and is interrupted by the vibrations of the fork itself. The interruption may beaccomplished by a platinum wire dipping into a cup ofmercury, as advised by Helmholtz. Or it may be duesimply to a platinum wire on the prong and an adjustablescrew on the… … 362 SOUND CHAP. VI the finger to obtain a slight initial vibration, and then adjustthe screw contact until the vibrations are increased andvigorously maintained. It is interesting to examine why the current is competentto maintain this vibration. If the end of the prong andcontact wire were quite…
Sound
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