Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 168
addition of coils of 100, 200, 300, 400, and1000 ohms; 3,111.5 ohm total resistance.F537. Resistance Box $32 50 Same as F536, but with further additions of coils of 3,000, 3,000 and4,000 ohms; 11,111.5 ohms total resistance.F538, Resistance Box and Wlieatstone Bridge $40 00 Consists of resistance… … Fig. 137. F539. F539. Carey-Foster Bridge and Commutator $35 00 Simplified form, complete with ratio coils of 1, 10, and 100 ohms. Indesign it resembles our high grade, model W4340, but is much more plainlyand simply made, and has no battery commutator.F545. Reading Telescope and Scale $10.00 This…
Electric apparatus and appliances · Equipment and supplies
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