Dolbear, A. E. (Amos Emerson), 1837-1910. The telephone : an account of the phenomena of electricity, magnetism, and sound, as involved in its action ; with directions for making a speaking telephone / by Prof. A.E. Dolbear.

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Dolbear, A. E. (Amos Emerson), 1837-1910.

The telephone : an account of the phenomena of electricity, magnetism, and sound, as involved in its action ; with directions for making a speaking telephone / by Prof. A.E. Dolbear.

Telephone.

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