A text-book on chemistryFor the use of schools and colleges . en, and having attach-ed to the stopcock a, Fig. 202, a tobac-co-pipe, b, by dipping the pipe in a so-lution of soap, bubbles may be blown. These risethrough the air with rapidity, and if a light be broughtnear them they burn with a yellow flame. If the bagbe filled with a mixture of hydrogen and air, the bub-bles will explode violently. 2^.203. If in a strong brass gun, Fig. 203, we place amixture of hydrogen, 1,and air, 3, and, hav- Fining inserted the corktightly, pass a lightinto the touch-hole,a violent explosiontakes place, th
A text-book on chemistryFor the use of schools and colleges . en, and having attach-ed to the stopcock a, Fig. 202, a tobac-co-pipe, b, by dipping the pipe in a so-lution of soap, bubbles may be blown. These risethrough the air with rapidity, and if a light be broughtnear them they burn with a yellow flame. If the bagbe filled with a mixture of hydrogen and air, the bub-bles will explode violently. 2^.203. If in a strong brass gun, Fig. 203, we place amixture of hydrogen, 1,and air, 3, and, hav- Fining inserted the corktightly, pass a lightinto the touch-hole,a violent explosiontakes place, the hydrogen combining with the oxy-gen of the air to produce water, HO* Musical sounds originate in vibratory movementscommunicated to the air. If the flame of the philos-ophers lamp be covered by the neck of a broken re-tort, Fig. 204, a loud sound is emitted. This arises I To what use is hydrogen applied on account of its lightness?How may this be illustrated on a small scale ? Describe the hydro-gen mortar. How may musical sounds be produced by hydrogen ?. THE OXYHYDROGEN BLOWPIPE. 233 from the circumstance that the hydrogen burns in thetube, giving rise to a series of small explosions whichfollow each other with rapidity, and these explosionsthrow the air in the tube into vibration. As the tubeis raised or lowered, the explosions occur with differentdegrees of rapidity, producing sometimes a clatteringsound and sometimes a pure musical note. Whatever may be the circumstances under whichhydrogen burns—whether quietly in the philosopherslamp, or with trivial explosions as in the tube, or withviolent detonations, water alone is produced. It maybe condensed from burning hydrogen by lowering acold porcelain plate upon the flame. During the com-bination of hydrogen and oxygen a very great amountof heat is given out, for the former combines with eighttimes its weight of the latter, a greater proportion thanis met with in the case of any other substance. Advan-tage is taken of thi
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