. Elements of chemistry ... and asthe weight of 100 cubic inches of these gases is known,it is easy to compute the weight of the volumes consumed,and, by weighing the globe, to compare it with the weightof water produced. By such experiments, made with every attention to ac-curacy, together with that before described, of weighingthe gases by means of exhausted vessels, Fig. 52, it isproved, that hydrogen and oxygen unite in the proportionsof 2 of the first to 1 of the last, by volume; and in the propor-tions of 1 and 8, by weight; that the sole product of the corn-Is it absolutely certain by t
. Elements of chemistry ... and asthe weight of 100 cubic inches of these gases is known,it is easy to compute the weight of the volumes consumed,and, by weighing the globe, to compare it with the weightof water produced. By such experiments, made with every attention to ac-curacy, together with that before described, of weighingthe gases by means of exhausted vessels, Fig. 52, it isproved, that hydrogen and oxygen unite in the proportionsof 2 of the first to 1 of the last, by volume; and in the propor-tions of 1 and 8, by weight; that the sole product of the corn-Is it absolutely certain by this experiment, that it is the oxygen of the atmos-phere which unites with the hydrogen to form water I How may it be demon-strated that the combustion of hydrogen and oxygen form water? Describe theapparatus represented by Fig. 63, and explain how the two gases are broughttogether, and how inflamed I At the end of the process, how is it ascer-tained what proportion of each gas has been consumed, and how much waterformed ?. COMPOUND BLOWPIPE. 149 bustion of the two gases is water, and that the weight ofthe water is just equal to the combined weights of the twogases. In this manner has the constitution of water beendemonstrated beyond all doubt or controversy. COMPOUND BLOWPIPE Fig. 64. on 301. When hydrogen and oxygen are burned together,in the proportions in which they form water, a most intenseheat is produced. The compound blowpipe, the instrumentby means of which the combustion of the two gases isregulated for this purpose, was invented by Professor Hare,of Philadelphia, in 1801. The apparatus consists of twopipes, which convey the gases from two gas-holders, toanother short pipe, at the end of which their combustiontakes place. The principle of thecompound blow-pipe willbe understood by Fig. two brass pipes, c andd, are connected with thegas-holders, a and b, bycoupling screws, which fixtheir lower ends to shorttubes, furnished with stop-cocks, as seen in the figure
Size: 1609px × 1553px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, bookidelementsofch, bookyear1847
