ON THE VEGETATION OF PLANTS, 



157 



It appears from this table, that the leaves of thirteen differ- 

 ent plants, feparately expofed in forty ounce meafures of the 

 water of the river Schuyltrill, produced about ten drachm 

 meafures of air, the principal part of which was azotic gas ; 

 whereas the fame kind of leaves, expofed in the fame quan- 

 tity of the fame water, impregnated with carbonic acid, 

 yielded feventy-feven drachm meafures of oxigenous air, of* a 

 very high degree of purity. 



Count 



