Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 874
a phonoples circuitare bridged, as represented, liya condenser, through whichpass the induced currents thatoperate the phones. It willbe readily seen that the mainline, which passes throughthe magnetic coil and throughthe phone, is never broken,the former being charged anddischarged by means of… … 14.—The liey.opening for the transmission and
Mechanical engineering
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