CT.X. 



lim 



U, 



' ^^ ^§rl. 



Abo 



Offo. 



ut 



°^ two of 



'^r or Ion 

 ouredontli 





m 



open cup, 

 ^ough It haj 



t ond 



roppinc 



-ar folutloa j 

 » or like tk 

 ^^^ thus rea- 



lefton waters, 

 of the alkali 



rth, they m 



■ be ufed as a 



c 



arbon, I * 

 ine In its 



eluded in 



'S, V 



II in 



the 



. acid, than 



IB 



Sect. X. 5 



MANURES 



4» 



may thence acquire by their abforbent po^^er the carbonic acid fro^ 

 thcfe minute particles of lime, as faft as they can recover ,t by ch - 



water, or from other inanimate 



mical attrad 



from the air, or 



fubftances in their vicinity 



Thirdly, the hyper oxygenation of the perfpirable matter of plants 

 which thence gives up oxygen gas in the funfh.ne woold .nduce u 

 to believe, that a great part of the carbon, wh,ch furn>ftes fo pr.n 

 cipal a part of vegetable nutriment, uas received by their roots m th. 



^ ^ * • It it becomes in part decom poled 11 



9 



form of carbonic acid 



and th 



hich thus abound 



th 



their circulation, giving up its oxygen , v „ ^ . 



fecreted fluids of vegetables from this fource, as well as from decom 



pofed w 



9 



Another way by which carbon is received into the vegetable 



fyftcm is by its exiftence 



fugar and in mucilag 



both which 



taken up undecoropounded.as appears by their prefence in the verna^ 



fap- juice, which is obtained from the maple 



and th 



bi r c h 



which 



like the chyle of animal 



abforbed in its undecompounded flate 



V. 



PHOSPHOR us. 



Another material which exifts, I believe, univerfally 



D 



bles! and has not yet been fufficiently attended to, is phofph 

 This like the carbon, nitrogen,, hydro 



nd fulph 



fimple fubftan 

 lyfcd any of them 



prefent ehemiftry h 



yet 



probably 



unly 



and therefore I fuppofe it is taken up 



and may hence be regiftered among the articles of 



by the abforbent veffels of vegetables, when it can be met with in 

 Aate of folution ; though it may alfo be occafionally formed and fe 



creted by them ; 



their food or fuftenance. 



When wood is decompofed by putrefaaion in a, certain degree of 



warmth and moifture, it is often feen to emit much light in 

 eveninc^s,. when recently broken and expofed to the oxygen of the 



^ ' atmofpherey 



dark 



\ 



