i©4 Vegetable Stat'icks. 



pulfion or trufion, it muft needs have rifen 



out of the ftem into the tube. 



Now ftnee this flow of fap ceafes at once, 

 as foon as the Vine was cut off the ftem, 

 the principal caufe of its rile muft at the 

 fame time be taken away 5 viz. the great 

 perfpiraticn of the leaves. 



For tho' it is plain by many Experiments, 

 that the fap enters the fap vefTels of plants 

 with much vigour, and is, probably carried 

 up to great heights in thofe vefTels, by the 

 vigorous undulations of the fun's warmth, 

 which may reciprocally caufe vibrations in 

 the veficles and fap vefTels, and thereby make 

 them dilate and contract: a little 5 yet it feems 

 as plain (from many Experiments, as parti- 

 cularly Exper. 13, 14, 15. and Exper. 43* 

 where tho' we are allured that a great quan- 

 tity of water pa(Ted by the notch cut 2 or 3 

 feet above the end of the ftem 5 yet was the 

 notch very dry, becaufe the attraction of the 

 perfpiring leaves was much greater than the 

 force of trufion from the column of water , 

 from thefe Experiments, I fay, it feems 

 evident, that the capillary fap veflels, out of 

 the bleeding fcafon 5 have little power to pro. 



trude 



