"12 
POMON A: QO, 
moift Earth; increafed in Weight by one Night's Dew, 180 Grains, and 
the next Day decreafed, one Ounce + 282 Grains. And that nothing 
might add to, or fubtract from, the Accuracy of this curious and ufeful 
Experiment, Mr. Hales placed thofe two Pans, in two other broader Pans, 
to preveat any Moifture fticking to their Bottoms, which might make 
the Quantity of Dew fallen, feem to be greater than it actually was. 
AND ‘twas found that a greater Quantity of Dew fell on that Earth 
which was moft moift, than on that which was drier, and more than a 
double Quantity on Water, than an equal Surface of moift Earth. For 
the Particles of Dew and Water being Homogeneous, do attract each other 
with a much greater Force, than Earth and Dew do, that are Hetero- 
geneous. 
“ THE Evaporation of a Surface of Water in a Winter's Day of nine 
“ Hours, is -+ of an Inch, of Ice fet in the Shade for the fame Space of 
** time 34 of an Inch. 
NOW if from the above Quantity evaporated 762 Grains, which 
are equal to 1 Ounce + 282 Grains, 
You fubtra& the Dew receiv’d in one Night - 180 
FHe-Retlerence 1s VS a hy 
This Difference of 582 Grains is the extraordinary Quantity evaporat 
from a Circular Area of Earth of one Foot Diameter every 24 Hours in 
the Summer, more than falls in Dew in the Night. Which in 21 Days, 
is near’26 Ounces. 
For — 582 the Quantity daily evaporated, 
Multiply’d by 21 the Number of Days ; 
582 | 
1164. 
The Produ is 12222 ~— Grains. 
And 
