RAINFALL IN HERTFORDSHIRE IN 1887. 
159 
The number of wet days in the year (average of 30 gauges) was 
146, being 24 less than the mean of our period. Of the total 
number there were 37 (or 26°/ 0 ) in the winter months, 43 (or 29°/ 0 ) 
in the spring, 21 (or 14°/ 0 ) in the summer, and 45 (or 31°/ 0 ) in the 
autumn. 
The number of wet days in each month and the deviation from 
the mean was as follows: 
Jan. 
13 —3 
April. 
12 — 1 
July 
. 8 —5 
Oct. ... 
.. 11 —3 
Feb. 
7 -8 
May . 
19 + 6 
Aug. 
.17 —3 
Nov.... 
.. 17 +1 
Mar. 
, 12 —2 
June ..... 
4 —10 
Sept. 
.11 +2 
Dec. ... 
.. 17 +2 
Distribution of Rainfall throughout the County .—Of the 30 rain- 
gauges 4 are in the river-basin of the Ouse for which they give a 
mean fall of 17-83 ins. in the year, and 26 are in the river-basin 
of the Thames for which they give a mean fall of 20-02 ins. The 
following table (Table III) gives the mean fall for each month 
and for the year in each of our six river-districts, and in the 
county, for comparison, and also the difference in the year from the 
mean of our period. 
Table III. —Rainfall in the River Districts. 
Months. 
Cam. 
IVEL. 
Thame. 
Colne. 
Lea. 
County. 
January .. 
i -24 
2*10 
2-91 
2*26 
1-56 
1'93 
February. 
•67 
•67 
•85 
•80 
•70 
74 
March. 
I-21 
1*22 
2*44 
178 
1-50 
1-62 
April . 
I-IO 
i-34 
1-47 
i'33 
1-08 
1-22 
May.. 
2*35 
2*37 
2‘8o 
2 29 
2-34 
2*34 
June... 
•48 
•91 
•98 
•80 
•65 
73 
July. 
•70 
•78 
•83 
•88 
79 
•82 
August. 
1-14 
i-o6 
•85 
1-27 
1-40 
1-28 
September . 
2'54 
2-77 
2-98 
3'°° 
2-92 
2-92 
October ... 
1-69 
1-64 
170 
1-56 
1-56 
1-58 
November . 
2-6l 
275 
3’67 
3'33 
2-99 
3-12 
December . 
1*10 
1-22 
2-13 
1 -62 
1-26 
1 '43 
Year . 
16-83 
i8-8 3 
23-61 
20-92 
.18*75 
1973 
Diff. from 1876-85 
—7-67 
—8-47 
—8-29 
—10-38 
—8-13 
—9-27 
The mean fall in the year in each of the minor river-basins, or 
sub-districts, was as follows:— 
Cam . Bhee . 
Ivel . Hiz. 
Thame Upper Thame. 
S Gade ... 
^ b orne . 
Lower Colne . 
The total yearly fall ranged from 15-84 ins. at Odsey Grange, 
to 25*09 ins. at Moor Park; and the total monthly fall from 0*42 in. 
at Royston in June, to 3-98 ins. at Moor Park in November. 
ms. 
16-83 
18-83 
23-61 
21- 27 
20-38 
20-10 
22 - 68 
Lea. 
ms. 
f Mimram. 18-45 
Beane. 19-13 
Bib. 18-86 
Ash. 19-60 
Upper Lea. 18-36 
Lower Lea. 18*93 
