378 



THE UNIVERSE. 



sor, since it is equal to the weight of a column of water 



eighty feet in height. 



Thus in an occult function, which is performed so mys- 



teriously in the 

 vegetable k i n g- 

 dom, experiment 

 reveals a power- 

 ful energy, an 

 energy which sur- 

 passes the visible 

 and tumultuous 

 circulation in the 

 largest animals. 

 Many physiolo- 

 gists have stated, 

 not without some 

 foundation, that 

 the sap rises in 

 the vessels of the 

 vine with at least 

 five times as much 

 I force as the blood 

 circulates in the 

 crural artery of 

 the horse, the 



m O S t important 

 111 i e 



blood-vessel of 

 the thigh, and with seven times as much force as in the 

 same vessel in the dog. 



It is certain that the blood which the heart projects so 



178. Force of Vegetable Circulation and Absorption. Hales' ex- 

 periment, modified, as shown at the Amphitheatre of Rouen. 



