rk at the previous bout. The bolt is then this hint he began experiments on a phonomoter, or instru- whose rope is coupled to the chain hanging from the scoop again withdrawn and the box is pulled into position, and is ment for measuring the mechanical force of sound waves box. When the scoop is… … EDISON'S PHONOMOTER. and throw his engine out of gear. After this is done the periments he constructed the machine shown in the engrav- very large amount of work. We take our illustration from ing, which exhibits the dynamic force of the voice. signal is then given to the opposite engineman :to…
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