Sect. V. Agriculture and Vegetation. 77 



will not corrupt. Heat is likewife necef- 

 fary, in order to excite and promote that in- 

 ternal motion of the particles which coiifti- 

 titutes putrefaction. As cold checks this 

 motion, it is a great enemy to all corrup- 

 tion. The admiffion of the external air is 

 likewife neceflary, as no intefline motion 

 can begin without its affiftance. Hence 

 bodies preferved from the immediate con- 

 tact of the external air, by being put in an 

 exhaufted receiver, or covered over with 

 greafe, are kept from corruption. 



BESIDES drinefs, cold, and want of 

 air, there are many other things which refift 

 corruption. But there are no fpecies of 

 bodies which are fo much in oppolition to 

 it as falts in general, whether alkaline, neu- 

 tral, or acid, but particularly the laft. 



THE particular feat or fubject of corrup- 

 tion, feems to be in the mucilaginous or 

 oily particles ; for the more of thefe fat oily 

 particles a body has, it corrupts, ceteris 



faribtf, 



