1 I 





; I 





i 









U 



Vegetable Staticks. 



thro' the leaves, on which account it mu ft 

 therefore imbibe water the more greedily 

 as is evident by many experiments in the fig 

 chapter. 



When a branch is fixed to a glafs tube 



fet in mercury, and the mercury fubfides at 



night, it will not rife the next morning 



(as the warmth of the fun increafes upon it) 



unlcfs you fill the tube firft full of water : 



For if half or % of the large tube c r be full 



of air, that air will be rarifled by the fun 5 



which rarefaclion will deprefs the water in 



the tube, and confequently the mercury 

 cannot rife. 



i But where little water is imbibed the 



i 



firft day, (as in the cafe of the green {hoots 

 of the Vine, Expcr. XXIII. ) then the mer- 

 cury will rife the fecond and third day, as 

 the warmth of the fun comes on, without 

 refilling the little water that was imbibed. 





Experiment XXV. 



In order to make the like experi- 

 ment on larger branches ( when I expec- 

 ted the mercury would have rifen much 



higher than in fmall ones ) I caufed glaf 1 



fes 





