214 Ahatyfis of the Air. 



That I might find whether the air was ab- 

 forbed by the fumes only of the Aquaregia^ 

 or by the acid fulphureous vapours, which 

 -4fcended from the Antimony , I put a like 

 quantity of Aquaregia into a bolthead & y 

 (Fig. 34.) and heated it by pouring a large 

 quantity of hot water into the cittern x x> 

 which ftood in a larger veflel, that retained 

 the hot water about it , but no air was ab- 

 forbed h for when all was cold, the water 

 ftood at the point z, where I firft placed it: 

 Yet in the diftillation of compound Aqua- 

 fortis, Exper. 75- a little wasabforbed. Hence 

 therefore it is probable, that the greateft 

 part, if not all the air, was abforbed by 

 the fumes, which arofe from the Antimony, 



Experiment XCII. 



Some time in February, the weather very 

 cold, I poured upon a quarter of a cubick 

 inch of powdered Antimony, a cubick inch 

 of compound or double Aqua-fortis in the 

 bolthead b, (Fig, 34-) in the firft 20 hours 

 it generated about 8 cubick inches of air 5 

 $fter that, the weather being fomewhat 

 warmer;, it fq nnented falter, fo as in 2 or 3 



hours 



