The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 381
he receiver to render thetones audible and distinct. The Blake Transmitter.—The transmit-ter invented by Blake, and novir employedby the Bell Telephone Company through-out the United States, is an improvedform of the Edison transmitter. A ver-tical section of its principal parts isshown in Fig.…
Electricity · Magnetism
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