Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 445
nd ofwhich is closed by a plug ofplaster of Paris, which shouldbe as thin as is consistent withstrength. This tube serves as abell for holding the gas underexperiment over the water con-tained in a tall glass jar; andit may be easily filled withoutwetting the porous diaphragm,by means of a glass… … Fig. 338. THE THREE STATES OF MATTER. 421 diaphragm. The tube, when filled with gas, should be so sup-ported that the water may be on the same level within andwithout the tube. If then the glass covering-plate is removed,the gas will be found to mix with the air through the thinplaster diaphragm,…
Matter · Heat
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