[ m ] 



I filled a jar with common air ? 

 and put one meafure of it, with one 

 of nitrous air frefhly made, in five 

 vefTels, each of a different diame- 

 ter, to incorporate with each other 

 without moving them : after an 

 •hour's time, I let up the airs of the 

 different jars into the large tube or 

 meafure, when f found that the co- 

 lumn of air occupied fo much the 

 greater fpace as the veffel in which 

 they flood was of a lefs diameter ; 

 but none of thefe airs were dimi- 

 nifhed near fo much as they were 

 when fhook immediately together 

 in the way above-mentioned. It 

 is very remarkable, that I could 

 fcarcely reduce any of thefe airs af- 

 terwards to a lefs bulk, though I 

 fhook them very forcibly in the 

 large tube after I had examined 

 them, 



125. The 



