he tube on theleft-hand slide. liaise the open tube till the mercury drives outall the air and begins to run out under the cap. Screwdown the cap, and lower theright-hand tube till the levelof the mercury in it is 80 cm.or more below the cap. Thespace under the cap is a goodvacuum. An air-pump made… … Fig.45. LIQUIDS AND GASES. 51 the incandescent lamp L expands and part flows to B. CloseA, open B, and raise C; air from B is expelled. Repeat, tillthe air in L is practically all exhausted. Then turn a currenton the filament in L, thereby heating it and driving off thegases in its pores, and seal…
Physics
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