

k 



1 



. 



60 



m 



Vegetable Statich. 



The hotteft Sun-fhine in the year 172^ 

 gave to the Thermometer, expofed to it, a 

 heat equal to that of the blood of animals, 

 viz. 64 degrees : And tho' plants endure 

 this and a conftderably greater heat, with- 

 in the tropicks, for tibiae hours each day, 

 yet the then hanging of the leaves of ma- 

 ny of them fhews that they could not lotig 

 iubftft under it , were they not frequently 

 lefrefhed by the fucceeding evening and 



nignt. 



The common noon-tide heat in the Sun 

 in July is about 50 degrees: The heat of 

 the air in the {"hade in July is at a medium 

 38 degrees. The May and June heat is, 

 from 17 to 30 degrees; the moft genial 

 heat, for the generality of plants, in which 

 they flourim moft, and make the greateft 

 progrefs in their growth. The autumnal 

 and vernal heat may be reckoned from 10 

 10 20 degrees. The winter heat from the 

 freezing point to 10 degrees. 



The fcorching heat of a hot bed of horfe- 

 dung, when too hot for plants, is 75 de- 

 grees and more, and hereabout is proba- 

 cy the heat of blood in high fevers. 





The 









