f^egetable Statich. 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. 
1 have fixed many other branches in the 
fame manner to long tubes, without im. 
meiTing them in water 5 which tubes, being 
filled with water, I could fee precifely, by 
the defeent 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 \\ a: niy\ cemented to 
the tube a b (Fig. 4.) 9 feet long, and f inch 
diameter an Apple-branch d 5 feet long 4 
inch diameters I poured water into the tube, 
v^hich it imbibed plentifully, at the rate of 
3 feet length of the tube in an hour. At 
I a clock 1 cut off the branch at r, 1 3 inches 
below the glafs-tubc. To the bottom oL, 
the remaining ftem I tyed a glafs ciftern 
covered with ox -gut, to keep any of the 
w^ter which droped from the ,ftcm cb from' 
evaporating. At the fame time I fet the 
branch 
