and its Discharge hy Drains. 
Table III. 
151 
Total of each Year. 
Years. 
Kain. 
Filtration. 
_ 
tioQ. 
Rain 
per Acre. 
In. 
Per Cent. 
Per Cent. 
1836 
31-0 
56-9 
43-1 
3139 
1837 
21-10 
32-9 
67-1 
2137 
1838 
23-13 
37 0 
63-0 
2342 
1839 
31-28 
47-6 
52-4 
3168 
1840 
21-44 
38-2 
61-8 
2171 
1841 
32-10 
44-2 
55-6 
3-251 
1842 
26-43 
44-4 
55-6 
2676 
1843 
26-47 
36-0 
64-0 
2680 
Mean 
26-61 
42-4 
57-6 
2695 
Table IV. 
April to September inclusive. 
Years. 
Rain. 
Filtration. 
Evapora- 
tion. 
Filtration . 
Evapora- 
tion. 
Bain, per Acre, 
Filtrated. 
Rain, per Acre, 
Evaporated. 
1836 
1837 
1838 
1839 
1840 
1841 
1S42 
1843 
Mean 
Id. 
12-20 
9-80 
10-81 
17-41 
9-68 
15-26 
12-15 
14-04 
12-67 
In. 
2-10 
0-10 
0-12 
2-60 
0-00 
0- 00 
1- 30 
0-99 
0-90 
In. 
10- 10 
9-70 
10-69 
14- 81 
9-68 
15- 26 
10- 85 
13-05 
11- 77 
Per Cent. 
17-3 
1-0 
1-2 
15-0 
0-0 
0-0 
10-7 
7-1 
7-1 
Per Cent. 
82-7 
99-0 
98-8 
85-0 
100-0 
100-0 
89-3 
92-9 
92-9 
Tons. 
212 
10 
12 
263 
131 
100 
91 
Tons. 
1023 
982 
1082 
1500 
980 
1545 
1099 
1322 
1192 
OcloXier to March inclusive. 
1836 
1837 
1838 
1839 
1810 
1841 
1842 
1843 
Mean 
18-80 
11- 30 
12- 32 
13- 87 
11- 76 
16-84 
14- 28 
12- 43 
13- 95 
15-55 
6- 85 
8-45 
12-31 
8-19 
14- 19 
10-40 
7- 11 
10-39 
3- 25 
4- 45 
3-85 
1- 56 
3-57 
2- 65 
3- 82 
5- 32 
3-56 
82-7 
60-6 
68- 8 
88-2 
69- 6 
84-2 
73- 2 
57-2 
74- 5 
17-3 
39-4 
31-2 
11-8 
30-4 
15-8 
26-8 
42-8 
25-5 
1574 
693 
855 
1216 
829 
1437 
1059 
720 
1052 
330 
452 
393 
159 
362 
269 
387 
538 
360 
Note. — The quantities of rain in the columns headed Filtration represent the 
required performance of drains in retentive soils. One-tenth of an inch of rain in 
depth amounts to 10- 128 tons per acre. 
