Vegetable Staticks. 107 



The greatcft height of the mercury be- 

 ing 3 2 -J- f inches 5 the force of the fap 

 was then equal to 3 6 feet 5 -f- f inches 

 height of water. 



Here the force of the rifing fap in the mor- 

 ning is plainly owing to the energy of the 

 root and ftcm. In another like mercurial 

 gage, (fixed near the bottom of a Vine which 

 run 20 feet high) the mercury was raifed by 

 the force of the fap 38 inches equal to 45 

 feet -}" 5 inches. -J- f height of water. 



Which force is near five timesgreater than 

 the force of the blood in the great crural ar- 

 tery of a Horfe ; feven times greater than 

 the force of the blood in the like artery of 

 a Dog $ and eight times greater than the 

 blood's force in the fame artery of a fallow 

 Doe: Which different forces I found by 

 tying thofe feveral animals down alive upon 

 their backs 5 and then laying open the great 

 left crural artery, where it firft enters the 

 thigh , I fixed to it (by means of two brafs 

 pipes, which run one into the other) aglafs 

 tube of above ten feet long, and fth of an 

 inch diameter in bore : In which tube the 

 blood of oneHcrfe rofe eight feet, three in- 

 ches, and the blood of another Horfe eight 



feet, 



