ng in communication with the line wire, L. This BT GEO. M. HOPKINS. arrangement is adapted to a closed circuit, one or two cells Professor Christlieb, of Bonn, gives the following statistics There are telephones and telephones, but in the host of showing the magnitude of the trade and its effects… … long, and is made slightly convex and very smooth at the Tig 1 -SIMPLE TELEPHONE. upon the fingers of one hand. Of telephonic receivers it may as well be said there are but two, for there are only two principles involved in their construction. Of transmitters there are but two that have gained any…
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