(711(1 othcf Gnffs afforded !y Alcohofand Ether. J l 



A later experiment, which llkewife proves it, confifls in mixing the gns v/ith oxigenated 

 muriatic acid gas, and burhing it before their reaftion has prefented the oil before mentioned. 

 In this experiment the glafs veflel is covered with coal refembling lamp-black. 



The twelfth paragraph announces the name the author* have cl-.ofen for their g.is, in 

 confequence of its nature and properties : it is carbonated oily hydrogenous gas. 



In the thirteenth, they fpeak of tlie elaftic fluid difengaged from ether treated with the 

 fulpliuric acid. Only three-fourths of this gas is converted into oil by the oxigenated mu- 

 riatic acid ; tlie refuiue burns blue, and is no longer reducible into oil by this acid. Alco- 

 hol and ether palTnig through a tube of pipe-clay, when ignited, afibrd a gas of this nature. 



The fourteenth paragraph announces the formation of an inflammable gas different from 

 the lad mentioned, or from the defiant gas, by pafTmg ether and alcohol through an ignited 

 glafs tube. This gas does not afibrd oil by the oxigenated muriatic acid gas. In order to 

 determine whether the porofity of the tube of clay was the caufe of the formation of the 

 oily gas, by fuffering fome principles to pafs through, or by admitting others, thefc phil'ofo- 

 phcrs included a tube of clay in another of glafs, and then paded alcohol and ether, after 

 having previoufly ignited the tubes. There was a produclion of defiant gas in this 

 cafe, as well as when the glafs tube contained fragments of pipe-clay. Hence they con- 

 clude that the clay contributes to the formation of this gas. 



•Similar experiments form the objedl of the three following paragraphs, which Mr. 

 Fourcroy abridges, by merely prefixing the number without any prefatory conneclion. 



15. A tube of glafs charged with alumine and ignited, through which they pafTed alcohol, 

 afforded an oily gas, the refidue of which, after the formation of the oil, burned with a blue 

 flame: the fame thing happened when filex was ufed inftead of alumine. When the tube 

 of glafs was filled with lime, or magnefia, or vegetable alkali, or charcoal, or fulphate of 

 pot-afli, and the alcohol was rcfpcftively paffed through thefe in the ignited flate, the pro- 

 dutl was a gas not capable of forming oil ; the earths were blackened in thefe experiments, 

 bulpliur, in a trial of the fame nature, afforded fulphurated hydrogenous gas not oily. 



i6. Alcohol and ether mud neceffariiy pafs, according to thefe authors, over alumine or 

 filex, ignited in a tube of glafs, to afford the defiant gas. The gas obtained from thefe 

 two fluids by paffing them through a tube of glafs does not become olefiant when paffed * 

 fecond time over alumine or filex, or through the tube of clay. This property, therefore, 

 when once loft, cannot be reftored. 



17. Carbonated oily hydrogenous gas paffed through an ignited glafs tube does not 

 diminifli its volume, and lofes the property of forming oil with tlie oxigenated muriatic 

 acid. The tube and the glafs which have been ufed in this experiment, are blackened and 

 covered with drops of cmpyreumatic oil ; they have the fmell of this lad produ£l: ; a black 

 foot covers the water of the apparatus. Six hundred eleSric fliocks paffnig through carbo- 

 nated oily liydrogenous gas incrcafed the bulk by two-fiftlis, and deprived it of its property 

 of forming oil, without haying precipitated carbonc. 



After having thus examined, in the firll fcventeen paragraphs, the properties of the 

 carbonated oily hydrogenous gas, the chemifts of the focicty of Amfterdam are employed 

 in the five following upon tv/o other kinds of claflic fluids obtained from ether and 

 alcohol by different proceffes. 



In tlic eighteenth par.igraph ihcy dcferihe the proccf* by whieh they have produced 



H 2 ilicfe 



