Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 896
the needle is deflected either to the rightor left, according to the will of the operator. The instrument by which thisis effected is a commutator or key, G, fig. 846 ; its action is shown in fig. 847,while fig. 846 shows on a large scale how two stations are connected. Itconsists of a cylinder of… … strips are connected at the end by metallic wires, also insulated from eachother, in the following manner : a with b and f,/with d., and c with g. Foursprings press against the cylinder ; x and y arc connected with the poles ofthe battery, ;;/, with the earth plate, and // witli one end of the…
Physics
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