:t 



I. 



'ithi 



(. 



111. 





ein 



etit 



lllo 



of the year, 

 "^tions, and 

 as low as 

 "gifoliius. 



1 



! t an adapted 

 ical locomo. 

 s ; or in dill 

 re (lowly to 

 elements of 

 :Id and cal- 

 ^'hichoneor 



V 



Sect. X. 2. i» 



MANURES. 



191 



fted account of a numerous caravan, which having loft 



their provifion 



are 



affirmed to have lived fome week 



rout,, 

 gum 



b 



d 



Vegetables on the contrary, as above mentioned, can exift, though 



O _- ... •••■I 



m 



feebler flate, on water and air alone, 



th th 



bo 



d perhaps oth 



r 



fible folvends, which thofe 



acid 

 oid 



ably 



This 1 fuppofe to be owing to the low degree of heat 



hich they produce internally, and to the (low circulation of th 



circumflances lefs nutriment is expended 



blood 



from both which 



by animals which deep in winter. 



For the purpofe of fupplying adult vegetables with 



(hm 



we fliould firfl confidcr what kinds of matter 



mofi: p 



mod: 



flary 



th 



compofit 



Secondly, what of thefe fub 



fiances they can abforb without previous decompofition. Laftly, how 

 to expedite the decompofition of vegetable and animal fubftances on 

 or in the foil, like the digeftive procefles in the flomachs of animals ; 

 we may thus become acq^uainted with the fources and the manage 



h 



ment of manures.. 



e plants w35 



ad: with the 

 jduce fruit; 

 nrbon, tban 

 ried on hp' 



:n 



thefe t^v 







.Tier 

 do 



a 

 •r 



bloods'^ 



f CO* 



alone 



J 



cr 



I 



chto 



this IS 



en 



take 



iif^^ 



lere 



is a 



atte 



ri. 



A I R. 



* 



I. Oxygen combined with heat conftitutes that part of the atmo- 

 fphere, which is perpetually neceffary to animal and vegetable refpi- 

 ration ; and a greater part of that water, which forms a principal 

 portion of their organization ; a few words may be therefore preraif- 

 ed on thefe moft important difcoveries of modern chemidry. 



This vital air, called oxygen gas, conftitutes twenty -leven hun- 

 dredth parts of the atmofphere ; it is indifpenfably neceflary to the 

 exiftence of life, and of combuftion, and forms the principal part of 

 all acids ; whence its name. The other fcventy-three hundredth 

 parts of the atmofphere confift of azote, which takes its name from 

 its inutility to life in animal refpiration ; it is alfo called nitrogen,, 

 becaufe it conftitu tes the bafis of nitre.. 



£■ ' Oxygen: 



