ube fits loosely on to a glass flask. Acork passes through the top of the tubeand the thermometer is inserted througha hole in the cork, its bulb being wellabove the surface of the water in the flask.As the water boils steam passes roundthe thermometer bulb and issues betweenthe flask and the loose… … 20 HEAT. [CH. Ill the cover. The thermometer is thus in a current of steamwhich is protected from the cooling action of the air by theouter downward current. After a time the mercury becomessteady. Adjust the thermometer until the top of the columnis just visible above the cork, leave it in that…
Heat · Light
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