Meadowcroft, Wm. H. (William Henry), b. 1853 · New York & London, Harper & brothers · leaf 64
. 11 THE TELEPHONE sketch (Fig. 11), so that it will only just touchthe diaphragm. Now, if you speak into theopen end of the tube the diaphragm will vi-brate and the shot will be seen to move to andfrom it according to the strength of the vibra-tions. If we could by any means make a dia-phragm in… … Fig. 12 surprising that they can be made to producepower. This is done by an ingenious mech-anism called a Phonomotor, perfected by 47 A-B-C OF ELECTRICITY the great inventor Thomas A. Edison, ofwhom every one has probably heard. Thismechanism, when spoken or sung at (or into)immediately responds…
Electricity
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