commerce of the city. a drop of sealing wii_\. A fine copper wire is wound around SOME UODIFICATIONS OF THE HICBOFHONE AND The peculiaritj' of the French dam is that it is the dam of the carbon, D, and connected with the battery. TELEPHONE. The construction of the microphone shown in Fig. 3 is BY… … NEW FOBM OF TELEPHONE. MICBOFHONE WITH 6BAFHITE BODS. 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 forms of microphone are easily constructed, but all, so far lock,…
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