1 3 8 Vegetable Static ks. 



what and where that power is which can 

 be equivalent to that provifion nature has 

 has made for the afcent of the fap in confe- 

 quence of the great perfpiration of the leaves. 

 The inftanees of the JeiTamine tree, and 

 of the Paflicn tree, have been looked up- 

 on as ftrong proofs of the circulation of the 

 fap, becaufe their branches, which were far 

 below the inoculated Bud, v/erc gilded : 

 But we have many vifible proofs in the Vine 

 and other bleeding trees of the fap's reced- 

 ing back, and pufiiing forwards alternately, 

 at different times of the day and night. And 

 there is great reafon to think, that the fap 

 of all other trees has fuch an alternate, re- 

 ceding and progreifive motion, occafioned 

 by the alternacies of day and night, warm 

 and cool, tnpift and dry. 



lor the fap in all vegetables does proba- 

 bly recede in forne meafure from the tops 

 of branches, as the Sun leaves them $ be- 

 caufe its rarifying power then ceafing, the 

 greatly rarified fap, and air mixt with it , 

 will condenfe and take up lefs room than 

 they did, and the dew and rain will then 

 be ftrongly imbibed by the leaves, as is pro- 

 bable from Exper. 42, and fcveral others 5 



whereby 



