Vegetable Staiids. i o 5 



tfude fap in any plenty beyond their orifices j 

 but as any fap is evaporated off, they can 

 by their ftrong attraction (afliftcd by the 

 genial warmth of the fun ) fupply the great 

 quantities of fap drawn off by pcrfpiration. 



■• 





' Experiment XXXVI. 



April 6th at 9. a m. rain the evening be- 

 fore, I cut off a Vine on a fouthcrn af- 

 pect, at a (Fig. 18.) two feet nine inches 

 from the ground, the remaining Item a b, 

 had no lateral branches, it was f inch dia- 

 meter, I fixed on it the mercurial gage ay. 

 At 11 am. the mercury was rifen to^, 15 

 inches higher than in the leg x, being pufhed 

 down at x , by the force of the fap which 

 came out of the item at a. 



At 4/>. m. it was funk an inch in the leg z y. 



April 7th at 8 a. m. rifen very little, a 



fog: at 1 1 a.m. 'tis 17 inches high, and the 

 fog gone. 



April 10th at 7 a. m. mercury 18 inches 

 high; I then added more mercury, fo as to 

 make the furface* 23 inches higher tkztixs 

 the fap retreated very little into the item, 

 upon this additional weight, which (hews 



with 



I 







