Prescott, George B. (George Bartlett), 1830-1894. The speaking telephone, electric light, and other recent electrical inventions [microform] / by George B. Prescott ...

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Prescott, George B. (George Bartlett), 1830-1894.

The speaking telephone, electric light, and other recent electrical inventions [microform] / by George B. Prescott ...

Electrical engineering.

Telephone.