Vegetable St-aticks. 107 



<c glafs, which keeps quick-filver fufpended 

 u to the height of 60 or 70 inches, and 

 " therefore acts with a force, which would 

 u keep water fufpended to the height of 

 11 above 60 feet. 



" By the fame principle, a fponge fucks 

 <c in water; and the glands in the bodies of 

 " animals, according to their feveral natures 

 " and difpofitions, fuck in various juices 

 " from the blood." 



And by the fame principle it is, that we 

 fee, in the preceding Experiments, plants im- 

 bibe moifture fo vigorouily up their fine ca- 

 pillary vefTels; which moifture, as it is car- 

 ried off in perfpiration, (by* the action of 

 warmth ) thereby gives the fap-veffels liber- 

 ty to be almoft continually attracting of 

 frefli fupplies ; which they could not do, if 

 they were full faturate with moifture : For 

 without perfpiration the fap muft necefTarily 

 ftagnate, notwithftanding the fap-veffels are 

 fo curioufly adapted by their exceeding fine- 

 nefs, to raife the fap to great heights, in a 

 reciprocal proportion to their very minute 

 diameters. 



C H A P. 



