166 Anahjts of the Air. 



weight cf water to Air, being nearly as 

 SS5 to one, as Mr. Hawksbee found it, by 

 an accurate Experiment. A cubicle inch of 

 Air will weigh f of a grain, whence the 

 weight of Air m the horn was 3 3 grains, 

 that is, near j part of the whole horn. 



We may obferve in this, as alfo in the 

 preceding Experiment, and many of the 

 following ones, that the particles of new 

 Air were detached from the blood and 

 horn, at the fame time with the white fumes ? 

 which conftitute the volatile fait: But this 

 volatile fait, which mounts with great acti- 

 vity in the Air, is Co far fro derating 

 true elaftick Air, that on the contrary it 

 abforbs n > as I found by the following Ex- 

 periment, 



Experiment LIL 



A dram of volatile fait of fal armoniack, 

 focn diftilled over with a gentle heats but 

 tho J the expanfion in the receiver was dou- 

 ble that of heated Air alone, yet no Air 

 was generated, but two and an half cubick 

 inches were abforbed, 



Expe- 



