••X. 



Il 



•5. 





w 



rt 



in- 



''^^^ of 



toth 



erwlfe 



■bed by th 



e 



es and 



mu. 



-lals ; 2-: 



J 



icha' 



J 



r, 



m 



;i"eat city, if 



y much im. 

 not only in 



" h re- wood, 

 There is a 

 : which any 

 iiourifh ani- 

 fame bene- 

 " Burn no- 



polition be- 



afcertain 



ig 



the fpo«- 



iTiay 



con 



I a 



fufficleiit 



- of li'^^ ^" 







fed\^ 



'itha 







le 



inches 1'^ 



II 



bo 



if 



) 



Sect. X 



5 



MANURES 



45 



it, 



about four years 



This fudden decay I believed to have been 



owing to the unchanging moifture of the board 



d at the fam 



u 



pofure to unchanged air without the power of much 



halation; by which 

 quent flow putrefad 



flow fermentation was induced 



checked by the extremes 



eith 



d a confe- 



f heat 



cold. 



For the fame 



fon I fuppofe the wooden fupporters of bridg 



decay firft jufl: above the furface of the water ; and pieces of timber 



which are there expofed to 



buried but a few inches under ground 



go quicker into ferm 



the influence both of water and air, 



and confequent putrefa6lion, than thofe pieces of timber 



many feet buried beneath the foil, or immerfed deep 



which 



hich 



that fituatlon continue unchanged fo 



ages. 



The fame feems 



th 



fermentation, which is inftantly checked, if 



totally flopped, by bunging the barrel-, or corking the bottle, which 

 contains it, and thus precluding the accefs of atmofpheric air, 



3. From hence it may be concluded, firfl:, that the vegetable and 

 animal fubfl:ances, which we wifh foon to become decompofed by 

 the fermentative and putrefadive procefles, fliould be expofed to an 



[liform moifture, thouo;h not covered deep 

 lly pradifed in the 



water 



-s^ 



firfl: part of the preparation of hemp or fl 



which is defiened to diflblve the mucilage, and the cellular mem- 

 brane of thofe vegetables, without injuring the ligneous fibres. And 



that they fhould be fo far accumulated 



much to exhal 



yet not to lie in fuch 



ps, as entirely to preclude the accefs 



of air from the interior parts of them. 



The manures of great farms fliould therefore be occafionally re^- 

 moved from the fold-yards, or large refervoirs of it, and laid in fmall 



heaps not only to 



fe its furface expofed to th 



fphere, for the purpofe of exciting greater fermentation, which is a 

 flow combuflion J but alfo that air may be imprifoned in the interflices 



of thefe manure-heaps, as mentioned in No. 8, 2. of this Sedion. 



It 



