84 
J. HOPKINSON-HALF-A-CENTUEY S 
to our reports on tlie rainfall, showing the years and the decades 
for which returns for each rainfall station are given in these 
reports. The symbols in the last column show the method by 
which the height of each gauge has been determined, 7j\ signifying 
that a series of levels has been taken to the gauge from an 
Ordnance bench-mark, T that the height has been ascertained 
approximately from the same source, L that levels have been taken 
to the gauge from some datum other than Ordnance mean sea- 
level, and B that the height has been taken by the barometer. 
Table I. — River Districts and Distribution of Rainfall Stations. 
No. 
River Districts. 
1840 
-49 
1850 
-59 
1860 
-69 
1870 
-79 
1880 
-89 
1889 
1 
Ouse 
( (lam. ... 
TMififi .. 
I 
j 
i 
i 
2 
3 
i 
I 
2 
2 
4 
r Thame 
Upper Thame 
... 
I 
5 
fChess .. 
6 
Bulbourne ... 
I 
2 
I 
2 
7 
Colne - 
(trcIo.. 
I 
i 
I 
j 
2 
2 
Yer . 
8 
2 
3 
3 
4 
9 
Upper Colne 
J 
•J 
10 
w 
^Lower Colne 
... 
... 
I 
I 
3 
11 
< < 
Brent 
Upper Brent 
12 
K 
L_i 
/'Mimram . 
... 
... 
2 
2 
13 
Beane . 
I 
2 
14 
Rib . 
2 
2 
15 
Lea ...-* 
Ash . 
I 
I 
I 
16 
Stort . 
17 
Upper Lea ... 
1 
I 
2 
4 
18 
''Lower Lea ... 
... 
1 
4 
I 
2 
7 
12 
18 
30 
Table II. — Mean Rainfall for Half a Century (1840-89). 
Months. 
1840-49 
1850-59 
1860-69 
1870-79 
1880-89 
1840-89 
January . 
2 '24 
2-20 
2 80 
2-58 
1 71 
2-31 
February. 
1*92 
1-19 
1 -67 
1-82 
i*95 
1 71 
March. 
1*51 
1-25 
2-04 
1-67 
1-58 
1-61 
April . 
i*54 
i-88 
1-50 
2 05 
i*9i 
178 
May. 
2T>8 
2‘22 
2'l8 
2-13 
2-06 
213 
June. 
171 
2-06 
2*39 
2’34 
1-99 
2*10 
July. 
2U2 
3-15 
i-86 
2 64 
274 
2-50 
August. 
2-30 
2-55 
2*55 
2 ’6 o 
1-92 
2-38 
September . 
2-45 
2*00 
2’47 
2*64 
2’6o 
2-43 
October . 
3*34 
3*22 
2-39 
2-56 
3 *i 8 
2-94 
November .. 
2-85 
2-23 
2 ’ 10 
2-76 
2*84 
2-56 
December . 
176 
i-55 
2'l6 
2-18 
2-26 
1-98 
Year. 
25-82 
25*50 
26’H 
27*97 
26-74 
26-43 
