60 Vegetable Statich. 
heat may be reckoned from io to 20 de- 
grees. 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 equal to 
85 degrees and more, and hereabout is pro- 
bably the heat of blood in high fevers. 
The due healthy heat of a hot-bed of 
horfe-dung, in the fine mold, where the 
roots of thriving Cucumber-plants were, 
in Feb . was equal to 56 degrees, which is 
nearly the bofom heat, and that for hatch- 
ing of eggs. The heat of the air under the 
glafs-frame of this hot-bed was equal to 
34 degrees-, fo the roots had 2 <5 degrees 
more heat than the plants above ground. 
The heat of the open air was then 17 de- 
grees. 
It is now grown a common and very rca- 
fonable practice, to regulate the heat of 
ftoves and green houfes, by means of Ther- 
mometers hung up in them. And for 
greater accuracy, many have the names of 
fome of the principal exoticks written up- 
on their Thermometers , over-againft the fe- 
veral degrees of heat, which are found by 
experience to be propereft for them. And 
I am informed that many of the mofi: cu- 
rious 
