< 



' 



:t 



4. 



4. 



^•^a of 



n 



y 



^^c, hs- ' 



tiuu 



I 



) 





Preiied 



' ' ^^ all bo. 



oil 

 out 



» S[ive 



out 



r 



^y ^he ortat 

 ^^ this lleatn 



•"'^ the form 

 jieat a quan- 

 :J ; and the 

 t fomc kinds 



er mortar, if 



ead on land, 

 )ecome moift 

 r quantity of 

 fo fpread 



I en 



r.pa 



ted with 



1 



11 then gra 



lation 



oftbc 



our 



and ex- 



an 



d water 



15 



^effary 



for Its 



he ^^ 



tbeo 



the 

 the 



attiio' 

 wate^' 





Sect.X. 4. 5 



MANURES 



moiftened 



th 



new ac quill 



f water from 



205 

 as that, 



ch before adhered to it, and had parted with its carbonic acid 



por 



yea 



On wh 



are months, and 



rs, 



in drving, as they continue to attrad water along with th 



d from the air, which ftands npon them in drops, till th 



li^e regains its original quanfty of carbonic acid and aga.u hard 



{lone, or forms a fpar by 



per fed: 



lefs difturbed cryf- 



tall 



5 



Th 



earth I fuppofe acquires carbon, both in a manner fimi 



the abo 



bv its attraaing either the carbohic acid 



the w 



£3 



hich it is difFufed, from the atmofpl 

 ty of carbonic a( 



and alfo by the fpecific 



id 



ten 



ereater th 



that 



f 



common an- ; 



d gas being ten times greater inau luctt ui 

 there muft be conftantly a great fediment of 



it on 



furface of the earth ; which in its ftate of folution in oxy 



d water may be readily drank up by the roots of 



6. A 



means 



by which vegetables acquire carbo 



in great 



ouantity may be from limeftone diffolved in water ; which though 



flo 



procefs occurs in 



merabl 



of water, which pafs 



thofe of Mat- 



which includes 



moft the whole of th 



throu<yh the calcareous or marly flrata of the earth 

 lock atd Briftol in paffing through limeftone ; and thofe about Derby 

 in paffincr through marl ; and is brought to the roots of vegetables by 

 the Hiowcrs, which fall on foils, where marl, chalk, limeftone, mar- 

 ble, alabafter, fluor, exift ; 



By this folution of mild calcareous earth in water not only 



Ihe carbon in the form of carbonic acid not yet made into gas, but 



the lime alfo, with which it is united, becomes abforbcd into the ve- 



etable fyftem, and thus contributes to the nutriment of plants both 



s fo much calcareous earth, and as fo much carbon. 



n. Another mode by which vegetables acquire carbon, may be by 



fland 





the union of th 



fimple fubftance, with which all garden-mould 

 bounds, with pure calcareous earth into a kind of hepar, analogous 



o the hepar of fulphur made with lime, which abounds in fome mi- 

 neral 



