BELL'S EARLY TELEPHONE. it gives the general idea. Many other investigators experimented with his tells phone. About 1868 Royal C. House an Ameri THE HOUSE TELEPHONE. MODERN CARBON OR MICROPHONE TRANSMITTER. REIS' TELEPHONE RECEIVER. REIS' TELEPHONE TRANSMITTER. EDISON'S CHEMICAL RECEIVER AND CARBON TRANSMITTER. curiosities of the telephone was Edison's loud-speaking, scientific american, 1896-07-25
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