Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 105
equal, otherwise the balancing pointmay not come on the slide wire. The contact maker K rests upon three hemispherical feet, two of 94 ELECTRICITY AND MAGNETISM CEtAP. which slide in the V groove running between E and F. This ensuresthat it shall always run exactly over the same path, and the… … Fig. 95. source of accident in the older patterns of metre bridge. Contactwith the wire is made by pressing the ebonite-capped key, and theposition of the contact with respect to the scale is determined by meansof a fine scratch on the piece of glass let into the slider. Calibration of Metre…
Electricity · Magnetism
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