Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 168
ied 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 is a thoroughly good and substantial instrument. The telescope-proper… … 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.)
Electric apparatus and appliances · Equipment and supplies
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