i> 



24.6 



MANURES 



Sect. X. 11. ? 



It fhould then be ufed on or in the foil, as it afterward lofes much 

 of its nutritive quahties by evaporation, or finking into the ground, 

 or draining away. 



3 



A due degree of heat is neceflary for the commencement of 



fermentation and putrefadion, as both vegetable and animal materials 

 as fruit or flefli, may be preferved for years if kept in an ice-houfe 

 below the freezing point of 32. And alfo, I am told, if they could 

 be kept in an uniform degree of heat above the boiling point of 2 



12. 



Aft 



hea 



the commencement of either of thefe proceffes a quantity of 



ed from the combinat 



of th 



which contributes 

 of the next particl 



oxy 



forward the procefTes by promoting th 

 of oxygen and carbon ; which may th< 



and carbon 



be 



compared to a flow combuftion, or to a gradual explofion of (y 



ppwder 



This heat therefore fliould 



be managed with fome addrefs 



as a 



quantity of it would calcine or evaporate too much of the ma 



d leave the remainder a lefs profitable mafs 



am 



formed 



happens, I 



fome parts of thofe heaps of manure, which 



ufed in the manufactory of white lead ; while on the contrary, when 



as in fevere froft, thefe proceflbs of decompo- 



V, 



the heat is too fmall, 

 fition will not comm 

 the former cafe, where the h 



may be flopped in their progrefs 



I 



g 



CO verm g 



o 



And wh 



oldh 



the whole manure-heap with foil and 

 the accefs of air. 

 beds, it may be r 

 th the 



the h 



may be checked by 

 turf, and thus pre- 



is too fmall 



cd or promoted by 



the heap 



a 



5 fpade, and thus confining a new quantity of 



On thefe accounts it appears, that in the vernal and 



tumnal months thefe procefTes mufl fucceed better than in the win- 

 ter or the fummer ones. 



4. Toward the end of the putrefadive procefs the materials fhould 

 be repeatedly turned over with the fpade, not only for the purpofe of 

 fimply expofing their interior parts to the atmofphere, but alfo of in- 



7 



eluding 



