Vegetable Statkks. 13 



half of what he takes in, by other eva- 

 cuations. 



For fince neither the furface of his body 

 wasextenfive enough to caufe fufficient ex- 

 halation, nor the additional wreak, arifing 

 from the heat of his blood, could carry off 

 above half the fluid which was neceffary to 

 be difcharged every 24 hours ; there was a 

 neceffity of providing the kidneys, to per- 

 colate the other half through. 



And whereas it is found, that 17 times 

 more enters, bulk for bulk, into the fap-vef- 

 fels of the plant, than into the veins of a man, 

 and goes off in 24 hours: One reafon of 

 this greater plenty of frefli fluid in the vege- 

 table than the animal body, may be, becaufe 

 the fluid which is filtrated thro' the roots im- 

 mediately from the earth, is not near fo full 

 freighted with nutritive particles as the chyle 

 which enters* the lacteals of animals; which 

 defect it was neceffary to fupply by the en- 

 trance of a much greater quantity of fluid. 



And the motion of the lap is thereby much 

 accelerated,, which in the heartlefs vegetable 

 would otherwife be very flow; it having 

 probably only a progreffive, and not a circu- 

 lating motion, as in animals. 



Since 



