6o Vegetable Staticks. 



heat may be reckoned from 10 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 

 glais- frame of this hot-bed was equal to 

 34 degrees; fo the roots had 26 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 rea- 

 fonable pradtice, 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 moft cu- 

 rious 



