484 



PRODUCTION OF 



Sect. XVII. 2. 4. 



but 



porate, that neither fermentation nor putrefadllou would enfue • 

 that they might be kept for years unchanged, as in the cold of 32. 



The degree of heat required for preferving roots fecure from froft 

 and from the procefs of germination, which is that betweeft the de- 



ees of 32 and 48 of Farenheit's thermometer, may be well mana 



o 



ed by ftoring them beneath the foil in dry fituations, as in dry 



a 



or in pits dug for 

 more attention th 



purpofe 



barns 



fually employed in the com 



but this req 



manner of 



floring potatoes, which are liable to be injured both by froil and 



germination. 



Thefe pits in a dry foil fhould be covered with mate- 

 rials, which condua heat ill, and alfo with fuch as might abforb any 

 putrid exhalations, which may occur, and thus check the proorefs of 

 putrefaction, if it fhould commence. 



;at, if it be confined over the furface of 



Air is a bad conductor of h 



any body, but not fo if it be perpetually changed ; as it then carries 

 away heat very rapidly, as any one may experience by being fanned 



fl 



hot day. Hence all fuch materials as pulTcfs large pores 



full of 



are bad 



\ 



dudors of heat 



blankets, fa 



dufl, wood-fhavings, or fl: 



nd will thence preferve the bod 



they cover, both from external cold and from external heat, 

 charcoal in coarfe powder not only includes much common 

 pores, but alfo has the property, efpecially if recently burn 



But 



of ab- 



buig putrid exhalat 



d is alfo itfelf of an unperifhabi 



/ 



ture 



feems peculiarly adapted to the purpofes above mentioned 



Hence the heaps of potat 



hoke 



th 



parfnips, or ground 



bba 

 d ^^ 



of turnips or of b 



o 



ba 



d perhaps pears, and apples, j 

 might be well preferved in p 



w 



ts, and the heads of 

 11 as nuts, almonds, 

 • cellars, or even in 



f they were firft covered with powdered charcoal an 



or two in thicknefs 



nd 



over th 



a 



covering 



inch 

 of faw-duft, and 



finally over thefe a thick impenetrable thatch of ft 



wh 



a 



{lore of provender for th 



6 



months and the fucceedino- fp 



may 



,i 



I 



