Vegetable Staticks. 41 



And this holds true in animals, for the 

 perfpiration in them is not always greater!: in 

 the grcateft force of the blood ; but then often 

 leaft of all, as in fevers. 



I have fixed many other branches in the 

 fame manner to long rubes, without immerf- 

 ingthem in water; which tubes, being filled 

 with water, I could fee precifely, by the 

 defcent of the water in the tube t, how faft 

 it perfpired off; and how very little perfpired 

 in a rainy day, or when there were no leaves 

 on the branches. 



Experiment XL 



Aug. 17. At 1 1 a : m y I cemented to 

 the tube ab (Fig. 4.) 9 feet long, and \ inch 

 diameter, an Apple-branch d y 5 feet long, -f 

 inch diameter; I poured water into the tube, 

 which it imbibed plentifully, at the rate of 

 3 feet length of the tube in an hour. At 

 1 o' clock I cut ofT the branch at r, 13 inches 

 below the glafs tube. To the bottom of 

 the remaining {tern I tied a glafs ciftern z, 

 covered with ox-gut, to keep any of the 

 water which dropped from the Hem c b, from 

 evaporating. At the lame time I let the 



branch 



