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Scientific American, Vol. 61, No. 24 (December 1889) (1889)
leaf 7
D. is fitted a pasteboard spool, F, the end of the magnet placed as near the diaphragm, wooden crosspiece into the bottom of the diaphragm of the size shown, and upon this spool is wound as h, as it can be without producing a jarring sound when cell. much of the No. 36 silk-covered wire as it will… … and small com- siderably reduced. Fie. 3.-FB0NT VIEW OF BIPOLAB TELEPHONE. iiuuLaamifs. When apiece of Fig. 4.-BEAB VIEW OF BIPOLAB TELEPHONE. © 1889 SCIENTIFIC AMERICAN, INCFeet · Water · Wbicb · Diaphragm · Witb · Scientific American · Tbis · Emin pasha · Captain forbes · Double cyanide · Water works · Tbe scientific · Thin tin · Carbonic acid · Fine wire · Bell crank
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