I 





fl 



I 







232 Anahfo of the Air: 



vcflcls, 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 vcflel, a greater quan- 

 tity of air was abforbed. Thus alfo filings 

 of Iron and Brimftone, which in a more ca- 

 pacious veiTel 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, 

 thar 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 ; 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 CVII. 



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 glafles, which he found 



with a moufe to be r 4 part of the whole 



air 



^ 



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to: 



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