■fr* 



cc 



cc 



cc 



ic 



m 



Vegetable Staihks. 99 



rifen higher , if it had not been clogged 

 by the mercury in the gage z. For which 

 reafon the moifture role but 20 inches in 

 the afhes, where it would otherwifc have 

 rifcn 30 or 40 inches. 



And as Sir Ifaac Newton (in his Op- 

 ticks query 31.) obferves, " The water rifes 

 up to this height, by the action only of 

 thofe particles of the afhes which are 

 upon the furface of the elevated water ; 

 the particles which are within the water, 

 " attrading or repelling it as much down- 

 wards as upwards ; and therefore the ac- 

 tion of the particles is very ftrong : But 

 the particles of the afhes being not fo 

 denfe and clofc together as thofe of 

 glafs, their action is not fo ftrong as that 

 of glafs, which keeps quick-filver fufpen- 

 " ded to the height of 60 or 70 inches, 

 " and therefore afts with a force, which 

 " would keep water fufpended to the height 

 *' of above 60 feet. 



" By the fame principle, a fponge fucks 

 in water, and the glands in the bodies of 

 animals, according to their feveral na- 

 tures and difpofnions, fuck in Various 

 juices from the blood.'' 



H 2 And 



<< 



if 



cc 



cc 



cc 



cc 



cc 



cc 



cc 



<< 



>■ 





