68 



was run out, then stopping the pipe with the thumb, raising up the vessel 

 till the bottom was near the surface, and pouring in the air. The event was 

 as follows, October 28, 1780 : 



With common air it was .... 2" 15 running out. 



A second time 2'12i 



With air phlog. by liv. sulpht. 27 



With com. air 2*9 



" The spe. gra. of this air was tried by forcing 13895 of it into a bladder, 

 when it increased -,2^ of gra., by forcing out the air : therefore spe. gra. 

 = ,V l^ss than that of com. air : its test 



With N. air was 186 



Com. air 197 



Two measures of air 201-8." 



