8 6 Vegetable Staticks. 



thro' the leaves, on which account it muft 

 therefore imbibe water the more greedily, 

 as is evident by many experiments in the firft 

 chapter. 



When a branch is fixed to a glafs tube 

 fet in mercury, and the mercury fubftdes at 

 night, it will not rife the next morning 

 (as the warmth of the fun increafes upon it) 

 unlefs you fill the tube firft full of water : 

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

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

 which rarefaction will deprefs the water in 

 the tube, and confequently the mercury 

 cannot rife. 



But where little water is imbibed the 

 firft day, (as in the cafe of the green moots 

 of the Vine, Exper. 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- 



fes 



