Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 36
vibration of the diaphragm than ifthe needle were immersed a greater distance into the fluid. Bells liquid transmitter depended on variation in the extent of Iimmersion of the electrode, while Grays instrument, owing to the 13 14 AMERICAN TELEPHONE PRACTICE. great extent to which the pin was… … FIG. ]3.-BELLS CENTENNIAL LIQUID TRANSMITTER. Centennial in 1876, and, unlike that of Reis, simply caused variations. in the resistance of the circuit, and thereby allowed a continuousbut undulatory current to pass over the line, the variations in whichwere able to reproduce all the delicate shades…
Telephone
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