[ # I 



and holding it within the body of the fixed air at 

 the brewery, to fet a glafs vefTel into it, with its 

 mouth inverted. This glafs being necerTariiy rilled 

 with the fixed air, the liquor would rife into it when 

 they were both taken into the common air, if the 

 fixed air was abforbed at all. 



Making ufe of ether in this manner, there was a 

 conftant bubbling from under the glafs, occafio.ned 

 by this fluid eafily rifing in vapour, fo that I could 

 not, in this method, determine whether it imbibed 

 the air or not. I concluded, however, that they did 

 incorporate, from a very difagreeable circumftance, 

 which made me defift from making any more expe- 

 riments of the kind. For all the beer, over which 

 this experiment was made, contracted a peculiar 

 tafte, the fixed air impregnated with the ether being,, 

 I fuppofe, again abforbed by the beer. I have alfo 

 obferved, that water which remained a long time 

 within this air has fometimes acquired a very dis- 

 agreeable tafte. At one time it was like tar-water. 

 How this was acquired, I was very defirous of mak- 

 ing fome experiments to afcertain, but I was dis- 

 couraged by the fear of injuring the fermenting 

 liquor. It could not come from the fixed air only. 



Having imagined that fixed air coagulated the 

 blood in the lungs of animals, and thereby caufed 

 inftant death j I fufibcated a cat in this kind of air, 

 and examining the lungs prefently after, found them 

 collapfed and white, having little or no blood in 

 them. 



In order to try the effect of this air upon the blood 

 Itfelf, I took a quantity from a fowl juft killed, and 

 divided it into two parts, holding one of them within 



the 



