experiment having even exhausted all the vessels employed before we began so

Experiment having even exhausted all the vessels

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experiment, having even exhausted all the vessels employed before we began, so that the hydrogen gas obtained might be free from any mixture of azotic gas. The results of that experiment will hereafter be given at large in a particular memoir. In numerous experiments, we are obliged to use tubes of glass, porcelain, or copper, instead of gun­barrels; but glass has the disadvantage of being easily melted and flattened, if the heat be in the smallest degree raised too high; and porcelain is mostly full of small minute pores, through which the gas escapes, especially when compressed by a column of water. For these reasons I procured a tube of brass, which Mr de la Briche got cast and bored out of the solid for me at Strasburg, under his own inspection. This tube is extremely convenient for decomposing alkohol, which resolves into charcoal, carbonic acid gas, and hydrogen gas; it may likewise be used with the same advantage for decomposing water by means of charcoal, and in a great number of experiments of this nature. [Pg 404] [Pg 405] [Pg 406] [Pg 407]
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  • Summer '20
  • Sect., Mr Lavoisier, Mr Meusnier, Mr de la Briche

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