Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 607
n sharpenedat each end and placed loosely between the carbons: theyare inclined at different angles, so that the motion of the 584 EXPERIMENTAL SCIENCE. diaphragm, which would jar one of them, would simplymove the others so as to transmit the sound properly. Bat-tery wires, which are connected with… … Microphone with Graphite Rods. has a piece of battery carbon, D, secured in an inclined posi-tion to the diaphragm near the middle, by means of sealingwax. Three carbon pendants, E, of different sizes, are sus-pended by ver} fine wires, so that they rest upon the uppersurface of the carbon, D. The…
Physics · Lantern projection · Electric apparatus and appliances
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