The Conclufion. $67 



Nor is this the only care, the thriving 

 and fertility of plants and trees depends much 

 upon the happy influence and concurrence 

 of a great variety of other circumftances. 

 Thus many trees are unfruitful by being 

 planted too deep, whereby their roots being 

 in too moift a ftate, and too far from the 

 proper influence of the Sun, whofe powex 

 greatly decreafes the deeper we go, as wc 

 fee in Experiment 20. they imbibe too much 

 crude moifture, which tho* produ&ive of 

 wood, is yet unkindly for fruit. 



Or if when not planted too deep, they 

 are full of crude fap, either by being too 

 luxurious, or too much fhaded 5 or are plan- 

 ted in a moift, when they delight in a dry 

 foil, then the fap is not fo fufficiently di- 

 gefted by the Sun's warmth, as to be in. 

 that du&ile ftate, which is proper for the 

 producing of fruit. 



And thus the Vine, which is known to 

 thrive well in a dry, gravelly, rocky foil, 

 will not be fo fruitful in a moift, ftifF, clay 

 ground : And accordingly we may obferve 

 in Experiment the 3d, that tho* the Vine 

 imbibed and perfpired more than the Ever- 

 green, yet it perfpired lefs than the Apple- 



tree, 



