Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 43
oarded on request.) WILLYOUNG IMPROVED CAREY-FOSTER BRIDGEAND COMMUTATOR. Tlic €arey-Foster Method, so called, is really nothing but aslightly specialized use of the Wheatstones Bridge. Though simplicity it-self it yet constitutes the most perfect means of determining a resistancewith the very… … Fig. 31. in the laboratories of the world. Consider the four gap bridge of fig. 31.Suppose X, Ri, Rg and S to be nearly equal. If, now, we get balance and then exchange X and S and balance again we can readily show that X=S-(x,-x,) p (10) where x^^first balance reading, X3=second balance reading…
Electric apparatus and appliances · Equipment and supplies
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