Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 89
Fig. 82. W4550-W4551. Closed. 84 … Fig. 83. W4550-W4551. Open. W4550. Willyoiing Conductivity Bridge ,... |225 00 For measuring the conductivity of copper wires and rods in 2)4 feetlengths and from No. 6 to No. 12 B. and S. inclusive. As used by theBridgeport Copper Co.; John A. Roeblings Sons Co.; Seymour Manufact-uring Co.; Coe…
Electric apparatus and appliances · Equipment and supplies
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