Of Vegetation. 347 



to thefe powers, that they uniformly concur 

 to the production and perfection of natural 

 Beings ; whereas, were fuch powers under no 

 guidance, they mud necefTarily produce a 

 Chaos, inftead of that regular and beautiful 

 Syftem of nature which we fee. 



We may plainly fee the influence of the 

 fun's warmth in expanding the fap in all the 

 parts of Vegetables, as well in the roots as 

 the body that is above-ground, by the influ- 

 ence it has on the fix Thermometers, defcribed 

 under Experiment 20. five of which were 

 fixed at different depths, from two inches to 

 two feet under-ground, the other being ex- 

 pofed to the open air. 



When, in the greateft noon-tide heat, the 

 fpirit of that which was expofed to the fun 

 was rifen, fince the early morning, from 2 1 

 to 48 degrees, then the fpirit in the fecond 

 Thermometer, whofe ball was two inches 

 under-ground, was at 45 degrees; and the 

 3d, 4th, and 5th Thermometers were gradu- 

 ally of lefs and lefs degrees of heat, as they 

 were placed lower in the ground to the fixth 

 Thermometer, which was two feet under- 

 ground, fa which the fpirit was 3 1 degrees 

 high. In this ftate of heat on all the parts 

 of the Vegetable, we fee the fun mult have 



a very 



