ed in its lower end. Thisterminal is covered with a layer of mercury and the restof the tube is nearly filled with dilute sulfuric acid. The 106 STATIC ELECTRICITY. top of T is closed by a tight-fitting rubber cork, throughwhich projects the capillary tube C, made by drawing outa thermometer tube.… … Fig. 51. pinch-cock P and is filled with pure mercury. Its upperend is closed by a piece of glass into which is fused thesecond platinum terminal. On compressing P the mercuryis forced through C, and on slightly releasing the pressureit draws part way up, bringing up the acid after it. Thewhole is…
Electronics · Electricity
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