Vegetable Statich. x \ t 



fo that at noon day I could not fee it fo 

 much as ftationary. 



Yet by Experiment the 3^, on the Vine 

 in the garden pot, it is plain, that a very 

 confiderable quantity of fap was daily pref- 

 fing thro' this ftem, to fupply the perfpira- 

 tion of the leaves, before I cut the Vine off. 

 And if this great quantity were carried up by 

 pulfion or trufion, it mud needs have rife^ 

 out of the ftem into the tube. 



Now, fince this flow of fap ceafes at once, 

 as foon as the Vine was cut off the ftem, 

 the principal caufe of its rife muft at the 

 fame time be taken away, viz. the great 

 perfpiration of the leaves. 



For tho' it is plain by many Experiments, 

 that the fap enters the fap-veflels of plants 

 with much vigour, and is probably carried 

 up to great heights in thofe veffels, by the 

 vigorous undulations of the fun's warmth, 

 which may reciprocally caufe vibrations in 

 the veficles and fap-veffels, and thereby make 

 them dilate and contract a little ; yet it feems 

 as plain, ( from many Experiments, as parti- 

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

 where, tho' we are affured that a great quan- 

 tity of water paffed by the notch cut 2 or 3 

 feet above the end of the ftem ; yet Was the 



notch 



