\j6 Analyfis of the Air. 

 contributes to the brisknefs of that and ma- 

 ny other mineral waters. I found thefe 

 feveral quantities of air, by inverting the 

 nofes of bottles, full of thefe feveral liquors, 

 into fmall glafs citterns full of the fame 

 liquor. And then fetting them all together 

 in a boyler, where having an equal heat, 

 the air was thereby feparated and afcended 

 to the upper parts of the bottles. 



Experiment LXVII. 



By the fame means alfo, I found plenty 

 of air might be obtained from minerals,, 

 Haifa cubick inch, or 158 grains of New- 

 caftle coal y 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 51 grains, which- 

 is nearly f of the weight of the coals. 



Experiment LXVIII. 



A cubick inch of frefh dug untried 

 earth off the common, being well burnt 

 in diftillation, produced 43 cubick inches of 

 air. From chalk alfo, I obtained air in the 

 fame manner. 



1 Ex- 



