[ *U ] 



fixed air, but what it was very fa? 

 from being before the fermentation. 

 That this may be the cafe I was in- 

 duced to fufpect by the following 

 experiments : I fqueezed the air out 

 of different vegetables, keeping them 

 tinder water, fuch as malva, potatoe- 

 plant, hyofcyamus, apples, <kc # I 

 expected to find the molt part of 

 this air fixed air : but I was much 

 difappointed ; for this air was not 

 diminifhable by fhaking it in water o 

 By examining it in another way, I 

 found that the flame of a wax-taper 

 would grow dim in it, and that it 

 was only fomewhat inferior in qua- 

 lity to common air ; for one meafure 

 of this air drawn from an apple, 

 with one of nitrous air, occupied 

 1.24; and that expreifed from the 

 leaves of hyofcyamus occupied 1.25* 

 The air exprefled from malva and 



potatoe- 



