Gilley, Frank M · Boston, Allyn & Bacon · leaf 416
test-tube with.water, cover it with 404 BATTERIES. 405 paper, and invert in the tumbler of dilute acid, pushing itdown over the copper. Make the copper touch the zinc. Inthis way the gas from the copper alone is collected. Try tolight it with a flame. The gas is hydrogen, exactly the sameas that… … Fig. 376. strips over the sides of the tumbler; from which strip do thebubbles come ? Soldered connections are rendered unneces-sary by a convenient stand (shown in Fig. 376). Strips ofcopper and zinc are held in clamps, the other ends of whichhave binding-posts to which wires are connected. Touch…
Physics
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