Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 349
re-ment of small differences of potential,and called the quadrant electrometer.It consists essentially of a metalliccylindrical box divided into foursegments. A, A\ B> B. withinwhich is hung, by a doublethread, t t\ a light alumi-num blade or needle. CD (Fig.213). The bifilar suspensionfurnishes… … Fig. 213. quadrants AAf, BB are connected by the wires. A wire, if,attached to the lower side of the needle dips in a dish of sulphuric acid, which serves the threefoldpurpose of damping the vibration of theneedle, making electrical connection be-tween the binding post R and the needle,and…
Physics
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