Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 112
s. The middle row is the Bridge, the top and bot-tom rows, the rheostat. In the centre of the Bridge is a split block com-mutator R x which can be connected to the Bridgearms by plugs. If the plugs are inserted in this commutator inthe direction of arrow L as shown, the resistancein the rheostat is…
Electric testing · Electric apparatus and appliances
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