Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 168
Fig. 138. F516. F546. Lamp and Scale . $17 50 Simple form for use with plane mirror. Either oil, gas, or electricasordered. (Same as ■W4210, fig. 23, page 33.) … Fig. 139. F.547. 164 F547. Masiietometer $16 00 Simple form suitable for students of the High School grade. Is strongly-made and capable of giving results of considerable accuracy. Completewith deflecting and deflection magnets, inertia ring, etc. F548. Copper Voltameter $7 50 As designed and used…
Electric apparatus and appliances · Equipment and supplies
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