On Rain, Evaporation, Ge, 361 
it was covered with grass thé same as any green 
field. Things being thus circumstanced, a re- 
gular register has been kept of the quantity of ~ 
rain water that ran off from the surface of the 
earth through the upper pipe (whilst that took 
place) and also of the quantity of that which 
sunk down through the 9 feet of earth, and ran 
out through the lower pipe. A rain-gage of 
the same diameter was kept close by to find the 
quantity of rain for any corresponding time. 
The following Tables shew the Result. 
‘Water through the two Pipes; | Mean, Mean |Mean 
Rain, |Evap. 
Inch. Inch. _Anch. | inch, Sone Nceoh, 
1796- 1797-1798." 
Jan. .1.897—  ,680— 1.774-+ 16450+] 2,458] 1.008 
Feb, 1-778 ,918-— 1,122 1.273 | 1.801] 5528 
March 5431— 3070— 335 | 279 | ,go2| ,623] - 
April ,220— 295— ,180 | ,999 1.717| 1-485} - 
May 2.027— 2443-4 010 [1.49344] 4.177] 2.684 
Jind” 581 -—», 726 299 | 2-483] 2.184 
July 2158 2925 —— 1,059 | 4.154| 4.095 
Aug, —— 25° 3168 | 3.554] 3-386 
Sept. =~ = 976 =—— _| 305 | 3.2791 2.954 
ct. pee 2680 era 9227 2.899 2.672 
Nov. —— 1.044 1-594 | 879 | 2.934] 2.055 
“Dees 5200 3.077 1.8784 1.718-+] 3.202) 1.484 
6.877— 10.934— 7:379 |8.402 1|33.560ler.158 
Raiti g0-629— 98.791—31,259 50/7945 
Evap.23.725-—- 27-857—29-862 
ooo 
on 
i 
