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Scientific American, Vol. 67, No. 6 (August 1892) (1892)

leaf 3

An illustration from Scientific American, Vol. 67, No. 6 (August 1892), 1892, leaf 3
ontal bar with annunciator drops over the top of each mouthpiece. When a party from a short distances and which, at the same time, can be structed that it may be readily adapted for use in either service, is shown in the accompanying picture. distant point desires to communicate, he simply rings… … and they can be so adjusted that the line can clear in of the standards, and the adjustment of the frame to Fig. 2 -THE SIMPSON ACOUSTIC TELEPHONE- going through holes in partitions and around angles. any desired inclination is effected by link bars or HOBIZONTAL ARRANGEMENT. The new telephone has…

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