: L ts 
potatoe-plants appeared to be fome- 
What better. This air is undoubt- 
edly the very air of the vegetable 
unaltered. . I placed all thofe vege- 
tables feparately near the fire in 
water, and by examining the air 
- difengaged from them 1 found it 
to be of a much worfe quality than 
that which I obtained by fqueezing; 
and by trying the air extracted from 
them by. actual ebullition, 1 found it 
to be poifonous, and to extinguifh 
flame. The air from an apple ob- 
tained by boiling was fo bad, that 
one meafure of it with oneof ni- — 
trous air occupied.1.71. Now thefe 
very plants, placed in the fame wa- 
ter.in the fun-fhine, yield very fine 
dephlogifticated airy and by fermen- 
tation they yield fixed air. Is it 
therefore not. probable, that. the 
Very air contained. in the .plantan 
| ee Geo its 
“ae 
