Elements of chemistry : including the applications of the science in the arts . a spring upon the occurrence of the explosion in the other limb. 3. The com-bustion of the mixed gases may be determined without explosion by means of a littlepellet of spongy platinum, and the experiment can then be conducted over mercuryin an ordinary graduated tube. 4. Another exact method of removing oxygen fromair, recommended by Gay-Lussac, is the introduction into the air of slips of coppermoistened with hydrochloric acid, which absorb oxygen with great avidity. 5. A solution in ammonia of the subchloride of
Elements of chemistry : including the applications of the science in the arts . a spring upon the occurrence of the explosion in the other limb. 3. The com-bustion of the mixed gases may be determined without explosion by means of a littlepellet of spongy platinum, and the experiment can then be conducted over mercuryin an ordinary graduated tube. 4. Another exact method of removing oxygen fromair, recommended by Gay-Lussac, is the introduction into the air of slips of coppermoistened with hydrochloric acid, which absorb oxygen with great avidity. 5. A solution in ammonia of the subchloride of copper, or of any salt of the sub-oxide of that metal, such as the sulphite, absorbs oxygen with great avidity, andmay be used in the analysis of air. 6. In the recent careful analyses of air by MM. Dumas and Boussingault ( 12, 1005) the oxygen was withdrawn, by passing air over reduced metalliccopper at a red heat. To obtain the necessary precision in the results, the experi-ment was conducted in the following manner. In fig. 114, a b is a tube of the Fiq. difficultly fusible or hard glass used in organic analysis, which is filled withmetallic copper (reduced from the black oxide of copper by hydrogen), and placedin a long trough-furnace of sheet iron, in which it can be heated to redness through-out its whole length. The tube is provided with stopcocks at both ends, andattached by caoutchouc tubes to small glass tubes. By one of these small tubesit communicates with a glass balloon V, of about 1200 cubic inches in capacity,having astopcock u; aud by the other r, with a series of tubes A, B, and C. Ofthese^ A is a series of bulbs containing a concentrated solution of caustic potassa,and is intended for the absorption of the small portion of carbonic acid present iuair; the U-shaped tube B contains fragments of pumice impregnated with thesame alkaline solution; and the similar tube C is filled with pumice impregnatedwith oil of vitriol, in order to dry the air
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherphila, bookyear1853
