i qo Vegetable Stanch. 



And by the fame principle it is, that we 

 fee in the preceding Experiments plants 

 imbibe moifture fo vigorously up their fine 

 capillary veffels ; which moifture, as it is car- 

 rycd off in perforation, ( by the a&ion of 

 warmth,) thereby gives the fap veffels li- 

 berty to be almoft continually attra&ing 

 of frefli fupplies, which they could not do, 

 if they were full faturate with moifture: Por 

 without perfpiration the fap muft neceffarily 

 ftagnate, notwithstanding the fap \xffds are 

 io curiouily adapted by their exceeding fine- 

 ncis y to raife the fap to great heights, m 

 a reciprocal proportion to their very minute 

 diameters. 



CHAP. III. 

 Experiments, Jhewing the force of the fap 



in the Vine in the bleeding feafon. 



HAVING in the firft chapter fliewn 

 many inftances of the great quanti- 

 ties imbibed, and perfpired by trees, and in 

 the fecond chapter, feen the force with 

 which they do imbibe moifture ; I propofe 

 next, to give an account of thofe Experi- 

 ments, which prove with what great force 

 r the 



