$ Vegetable Statich . 
The velocities, in the furface of the leaves, 
roots, and tranfverfe cut of the fiem, are 
gained by a reciprocal proportion of the 
furfaces. 
leaves = 5616 
roots =5 2 286 
ftem = 1 
4-1 
*U 
O 
QJ 
t4t in* 
tt i nch 
34 inch. 
Now, their perfpiring 34 cubick inches in 
twelve hours day, there muft fo much pafs 
thro’ the ftem in that time s and the velo* 
city would be at the rate of 34 inches in 
twelve hours, if the ftem were quite hollow. 
In order therefore to find out the quanti- 
ty of folid matter in the ftem, July zjth at 
7. a. m. I cut up even with the ground a 
Sunflower 5 it weighed 3 pounds 5 in thirty 
days it was very dry, and had wafted in all 
2 pounds 4 ounces 5 that is i of its whole 
weight : So here is a fourth part left for 
folid parts in the ftem, (by throwing a piece 
of green Sunflower ftem into water, I found 
it very near of the fame fpecifick gravity 
with water) which filling up fo much of the 
ftem, the velocity of the fap muft be increaf- 
fd proportionably, viz* 4 part more, (by 
reafon 
