



\y6 Analyfis of the Air. 



contributes to the brisknefs of that and ma- 

 ny other mineral waters. I found thefc 

 feveral quantities of air, by inverting the 

 nofes of bottles, full of thefc feveral liquors, 

 into fmall glafs citterns full of the fame 

 liquor. And then fettingthem all together 

 in a boylcr, where having an equal heat, 

 the air was thereby feparated and afcended 

 to the upper parts of the bottles. 



Experiment LXV1I. 



By the fame means alfo, I found plenty 

 of air might be obtained from minerals. 

 Half a cubick inch, or 1 5 8 grains of New- 

 caflle coal, yielded 180 cubick inches of air, 

 which arofe very faft from the coal, efpe- 

 cially when the yellowifh fumes afcended* 

 The weight of this air is 5 1 grains, which 1 , 

 is nearly f of the weight of the coals. 



Experiment LX VIII. 



A cubick inch of frefh dug untried 

 earth off the common, being well burnt 

 in din-illation, produced 43 cubick inches of 

 air. From chalk alfo, I obtained air in the 

 fame manner. 



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