Vegetable Stanch . i j 
half of what he takes in, by other eva- 
cuations. 
For fince neither the furface of his body 
was extenfive 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 neceflary to 
be difcharged every 24 hours; there was a 
necelfity 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 ve£ 
fels of the plant, than into the veins of a man, 
and goes off in 24 hours : One reafon of 
this greater plenty of frefh 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 
fraighted with nutritive particles as the chyle 
which enters the la&eals of animals ; which 
defeCt it was neceflary to fupply by the en- 
trance of a much greater quantity of fluid. 
And the motion of the fap is thereby much 
accelerated, which in the heartlefs vegetable 
would otherwife be very flow; it having 
probably only a progreflive and not a circu- 
lating motion, as in animals, 
2 
Since 
