y6 Vegetable Statich. 
vapours which are raifed by the warmth of 
the earth, are by the cooler air foon con- 
denfed into a vifible form. And I have ob- 
ferved the fame difference between the cool- 
nefs of the air, and the warmth of water in 
a pond, by putting my Thermometer, which 
hung all night in the open air in fummer 
time, into the water, juft before the rifing of 
the fun, when the like reek or fog was rifing 
on the furface of the water. 
CHAP. II. 
Experiment Sy whereby to find out the force 
with which Trees imbibe moifture, 
H aving in the i ft chapter fecn many 
proofs of the great quantities of li- 
quor imbibed and perfpired by vegetables, 
I propofe in this, to enquire with what force 
they do imbibe moifture. 
Tho' vegetables ( which are inanimate ) 
have not an engine, which, by its alternate 
dilatations and contraftions, does in animals 
forcibly drive the blood through the arte- 
ries and veins j yet has nature wonderfully 
contrived other means, moft powerfully to 
raife and keep in motion the fap, as will 
in 
