8 Vegetable Stanch. 



loots, and tranfverfe cut of the ftem, are 

 gained by a reciprocal proportion of the 

 furfaces. 



c 



leaves — f6i6 



>-. 



roots == 22.85 



u 





~£ 



item ;= i 



> 



iir inch 



i-=. inch 



34 inch. 



Now, their perfpiring 34 cubick inches in 

 twelve hours day, there muft fo much pafs 

 thro' the ftem in that time 5 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 27th at 

 7. a. m. I cut up even with the ground a 

 Sunflower j it weighed 3 pounds, in thirty 

 days ; it was very dry, and had wafted in all 

 2 pounds 4 ounces % that is 4 of its whole 

 weight : So here is a fourth part left for 

 folid parts in the ftem, (by throwing apiece 

 of green Sun-flower 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 beincreaf- 

 ed proportionately, viz. # part more, (by 



reafon 



