ad- membranes of the two cylinders or ed end of the shell, and is attached by clamp screws tightly to the pipe drums with the armatures of the elec- tro-magnets, one drum being placed to be threaded, drawing by the screw at each end of the telegraph wire. In the threading machine forward for… … lephones was placed in the experi- rica. The road is an extension of the mental room, and the other in the Cape Town and Wellington Railway, basement of an adjoining house. purchased by the government some Upon singing into the telephone the years ago, and is part broad and part sounds of the voice…
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-181-138.webp)
