aol uidditional Ohfervat'tons on Hydrocarhnatet. 



In the courfe of cxpejriments from which thcfe coiiclufions were drawn, a number ef 

 -curious fafts with regard to the different hydrocarbonates, as well as the gafeous oxide» 

 occurred; but thefc not being fo immediately conneiSted with the points to be afcertained, 

 were, for the fake of brevity, omitted ; I {hall now, therefore, enumerate feme of the 

 more remarkable, as well as adduce feveral additional proofs of the nature and compofition 

 of the gafeous oxide of carbon. 



The effedls of the oxigenated muriatic acid upon thcfe, and indeed upon all inflammable 

 gafes, are worthy of attention. If the pure oxigenated muriatic acid, in the form of gas, be 

 mixed in certain proportions with any of thefe inflammable gafes, and introduced into a 

 bottle filled with and inverted over water, although no immediate adtion may be at firft 

 perceptible, yet in twenty-four hours a complete decompofition and change of principlSs 

 will be found to have taken place, the products varying according to the nature of the in- 

 flammable gas employed, as will appear from the following experiments. 



I introduced into a phial (with a glafs ftopper) filled with and inverted over water, one 

 meafure of pure hidrogen, and afterwards two meafures of very pure oxigenated muriatic 

 acid gas;* thefe nearly filled the bottle; the ftopper was then introduced very tight under 

 water. Before the ftopper was introduced, a whitifli cloud appeared in the mixture, but 

 very little or no diminution could be perceived. The neck of the bottle being immerfed 

 under water, was fuffered to remain for twenty-four hours. At the end of this period the 

 water had rifen a little in the bottle, owing to the imperfedlion of the ftopper ; but when 

 this was withdrawn, the whole gas inftantly.difappcared, except abput one-tenth of a 

 me•^fure, which was found to be azote, and muft have originally been contained in the 

 twi meafures of oxigenated muriatic acid gas. In this cafe the produ£ls were manifeftly 

 common muriatic acid and water ; for the water in the phial contained common muriatic 

 acid, but did not in the leaft fmell lof the oxigenated. This experiment was repeated with 

 t'he fame refults, except that the refiduary gas, on the admiffion of water, was rather lefs. 



This faiSt furniflies us with an eafy method of afcertaining the purity of hidrogen gas 

 in moft cafes, and even when it may be mixed with other inflammable gafes, as will pre- 

 fentiy appear; 



I next tried the effe£ls of this gas upon the pure hydrocarbonates. For this purpofe I- 

 introduced into a bottle, filled with and inverted over water, one meafure of pure hydro- 

 carbonate (from camphor) well walhed, mixed with two meafures of the oxigenated 

 muriatic acid gas. On the firft conta£l; of the oxigenated gas-, a white cloud, and 

 ibme diminution, was perceived ; but this foon ceafed; the ftopper was then introduced, 

 and' the bottle fuffered to remain inverted in water for twenty-four hours. At the end of 

 this period the ftopper was' withdrawn under water, wlien the fluid inftantly rofe, and the 



• This gas was always obtained by adding the common muriatic acid to the oxigenated muriate of pot- 

 afli. It (houldncver be Kept long.before it is employed, as it very foon lofes part of its oxigen, and becomes 

 decompoftd. 



gas 



