Austin, Louis W. (Louis Winslow), 1867-1932, Thwing, Charles B. (Charles Burton), 1860-1946, joint author · Boston, Allyn and Bacon · leaf 81
hanging in the coil, and the other above it, — theywill be but little affected by the earths field. It will,in this case, be held in position by the elastic force ofthe suspending fibre; hence, this must be turned by meansof the milled head until the reading is zero. This instru-ment is, of course,… … Fig. 26. ELECTRICITY AND MAGXETISM. 69 flections. They are generally of low resistance, that is,not over two or three ohms. The Thomson Differential Galvanometer (Fig. 27) con-sists essentially of two pairs of coils, with a needle in thecentre of each pair. These needles are borne on an alumi-num…
Physics
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