Vegetable Statkks . 4 1 
And this holds true in animals, for the 
pcrfpiration in them is not always greateft 
in the greateft 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 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 pcrfpired off* and how very little per- 
fpired in a rainy day, or when there were 
no leaves on the branches. 
Experiment XL 
Aug. 1 y. At 11 a: m, I cemented to 
the tube a b (Fig. 4.) 9 feet long, and i inch 
diameter, an Apple-branch d 7 5 feet long, 4 
inch diameter* 1 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 I cut off* the branch at c, 13 inches 
below the glafs tube. To the bottom of 
the remaining Item I tied a glafs cittern z, 
covered with ox- gut, to keep any of the 
water which dropped from the ftem c bfaom 
evaporating. At the fame time I fet the 
branch 
