KINS. | so obvious as to require little description. One of the bat- The microphone now exists in many forms, and is an ex- tery wires terminates in a series of coils, F, and is attached ceedingly interesting instrument, although it has not, thus to the diaphragm above the middle. The other wire is… … MICROPHONE WITH GRAPHITE RODS. low tides. That is, it is a dam which is set up against the far, attained the usefulness of the telephone. The several stream when the stream is low, diverting the water into a forins of microphone are easily constructed, but all, so far | lock, after the manner of a…
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