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7. Extract of Letter to the President from H. E. Rosevelt, Esq., dated New York, Dec. 23, 1877

Published online by Cambridge University Press:  15 September 2014

H. E. Rosevelt
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Extract

“I saw the ‘Phonograph’ the other day, and though it is very crude I was much interested. I would briefly describe the idea as follows:—

“To the centre of an iron diaphragm is attached a metallic point resting against a strip of paper or tinfoil. You speak against diaphragm through a mouthpiece, at same time the paper being drawn under the points. The vibration of diaphragm and point indent the paper to various depths, making an undulating (as it were) mark, &c. Now, if said paper is afterwards drawn under the point, the diaphragm vibrates exactly as your voice made it vibrate, and all the sounds are reproduced exactly as you said them, making a most astonishing effect—singing, laughing, and articulate words were all reproduced.

Type
Proceedings 1877-78
Information
Proceedings of the Royal Society of Edinburgh , Volume 9 , 1878 , pp. 548
Copyright
Copyright © Royal Society of Edinburgh 1878

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