. Journal of electricity, power, and gas . NEW MINE TELEPHONES. The Western Electric Company announces the comple-tion ot the design of two new types of mine telephones, onwhich its engineers have been at work for the past eighteen. MiiiL- TtlLpbone. Metiil Typu. Closed. months. The accompanying cuts illustrate three views of thenew No. 336-E metal type set. A specially treated woodentype set has been developed, having the same general featuresof operation and arrangement as the metal set shown here.

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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity