232, Analyjis of the Air. 



veffels, by generating or abforbing mixtures. 

 As in the mixture of Aqua regia and Anti~ 

 mony in Experiment 91, by enlarging the 

 bulk of the air in the veffel, a greater quan- 

 tity of air was abforbed. , Thus alfo filings 

 of Iron and Buwjtone, which in a more ca- 

 pacious veffel abforbed 19 cubick inches 

 of air, abforbed very little when the bulk 

 of air above the ingredients was but 5 or 

 4 cubick inches : For I have often obferved, 

 that when any quantity of air is faturated 

 with abforbing vapours to a certain degree, 

 then no more elaftick air is abforbed : Not- 

 withstanding the fame quantity of abforb- 

 ing fubftances would, in a larger quantity 

 of air, have abforbed much more air 5 and 

 this is the reafon why I was never able to 

 deftroy the whole elafticity of any included 

 bulk of air, whether it was common air, 

 or new generated air. 



Experiment C VII. 



May 1 8, which was a very hot day, I 

 repeated Dr. Mayow's Experiment, to find 

 how much air is abforbed by the breath of 

 Animals inclofed in glaffes, which he found 

 with a moufe to be t \ part of the whole 



air 



