Vegetable Staticks. 41 



And this holds true in animals, for the 

 perfpiration in them is not always greateft 

 in the greateft force of the blood 5 but then 

 often leaft of all, as in fevers. 



I have fixed many other branches in the 

 fame manner to long tubes, without im. 

 merfing them 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 j and how very little per- 

 fpired in a rainy day, or when there were 

 no leaves on the branches. 



Experiment XL 



Aug. 17. At 11 a: m, I cemented to 



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



diameter an Apple-branch d 5 feet long | 



inch diameter j 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 a clock 1 cut off the branch at r, 1 3 inches 



below the glafs-tube. To the bottom of 



the remaining ftem I tyed a glafs ciftern z f 



covered with ox -gut, to keep any of the 



water which droped from the ftem cb from 



evaporating. At the fame time I fet the 



branch 



