Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 347
he followingnumbers of ohiiis^ resistance—i, 2, 2, 5 ;. 10, 20, 20, 50; 100, 200, 200, 500 ; up to 10,000 ohms. By pulling out one plug any one of these can be throwninto the circuit, and any desired whole number, up to20,000, can be made up by pulling out more plugs ; thusa resistance of 263 olnns… … Fig. 133. arrangement is that by adjusting A and C we determinethe proportionality between B and D, and can, in certaincases, measure to fractions of an ohm. Fig. 133 showsa more complete scheme, in which resistances of 10, 100,,and 1000 ohms are included in the arms A and C, 322 ELEMENTARY LESSONS…
Electricity · Magnetism
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