Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 82
own E. M. F. to be measured to the posts 1 and 5. Alter positionof plugs until balance is again obtained, when the readings of the phigpositions will give the E. M. F. Should the unknown E. M. F. be morethan 1.5 and less than 15 volts, bring A to point 4 and proceed as before.The plug readings must… … I ;i 3 4 Fig. 79. Diagram of W4520. 78 Recent CIiange§ in De§i§rn.—The high resistance, B, is100,000 ohms; in our present and recently revised type of instrument thistap-off resistance is contained in a separate tap-off box with stud-tipped flexibles for connecting to the main box. Any heat…
Electric apparatus and appliances · Equipment and supplies
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