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Scientific American, Vol. 35, No. 11 (September 1876) (1876)

leaf 4

An illustration from Scientific American, Vol. 35, No. 11 (September 1876), 1876, leaf 4
lan, Decatur, 111. A is a coarse screen on which the sand is thrown and the digging and the working of the machine. Fig. 1 is a ■ —■♦<«>*■— which keeps large pieces from passing into the machine. top view of the cutter and threader, and Fig. 2 a sectional The Human Voice Transmitted by Telegraph.… … the possibility of conveying vocal When the pipe is threaded, the ma- Fig. 2 sounds by means of the ord nary te- chine is returned for clearing the legraph wires and special appliances thread by a semicircular handle-with for transmitting and receiving the hook end, that is inserted into the…

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