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8 Vegetable Stattcksl 



roots, and tranfverfe cut of the ft em, 

 gained by a reciprocal proportion of 

 furfaces. • 



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leaves 



roots = 



Item 



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inch 



f 7 inch 

 34 inch. 



Now, their perfpiring 34 cubick inches in 

 twelve hours day, there mult fo much pafs 

 thro' the ftem in that time ; and the velo- 

 city would be at the rate of 34 inches in 

 twelve hours, if the Item 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 5 it weighed 3 pounds, in thirty 

 days 5 it was very dry, and had waited in all 

 2 pounds 4 ounces 3 that is $ of its whole 

 weight : So here is a fourth part left for 

 folid parts in the ftem, (by throwing a piece 

 of green Sun-flower ftem into water, I found 

 it very near of the fame fpeciflck gravity 

 with water) which filling up fomuch of the 

 ftem, the velocity of the fap muft be increaf- 

 ftj proportionably, viz. 7 part more, (by 



reafor* 



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