Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 260
Fig. 200.—Western Electriccalling device. Fig. 201.—Western Electricautomatic telephone. Capital letters must be used in the directory, to prevent confusionbetween the figure l and the letter l The complete desk telephone is shown in Fig. 201. The post whichcarries the transmitter is set back of…
Telephone
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