XXIY. 
METEOEOLOGICAL OBSEEYATIONS TAKEN AT WATFOED 
DUEING THE YEAE 1877. 
By John Hopelnson, E.L.S., E.G.S., E.R.Met.Soc. 
Read at Hoddesdon, 3rd November , 1887. 
Results of meteorological observations which. I have taken at 
Watford from the 1st of March, 1876, to the end of the year 
1886, have been given in the Transactions of the Society, with the 
exception of the record for the last four months of 1877. During 
that period I removed, discontinuing observations at Holly Bank 
in September and commencing them at Wansford House in October. 
At the former place observations had been taken at both 9 a.m. and 
9 p.m., at the latter they have been taken only at 9 a.m. 
In order to complete the publication of the principal results of 
the ten years’ series of observations, so that those for the first year 
of the series may be strictly comparable with the rest, except for 
the slight difference in the localities, which are only half a mile 
apart, I now give tables for 1877, for the first nine months for 
Holly Bank, and for the last three months for Wansford House, 
all the values being deduced from the 9 a.m. observations only. 
From these tables (pp. 206, 207) the following summary for the 
different seasons is deduced, December, 1876 (from the report for 
that year), being included in the winter season, and results for 
Greenwich Observatory being added for comparison as usual. 
Watfokd. 
Seasons, 
1876-77. 
Pressure. 
Temperature. 
Tension 
of 
Yapour. 
Humi¬ 
dity. 
Eainfall. 
loud 
0 - 10 . 
Mean. 
Daily 
Eange. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter ..... 
29766 
42 ’5 
8 -i 
•242 
9i 
12-52 
66 
7'4 
Spring . 
29-813 
44 '2 
14-2 
•234 
78 
7-88 
55 
7-0 
Summer. 
29-950 
59 b 
i8-2 
•392 
74 
7-91 
42 
57 
Autumn. 
29-913 
48*1 
16-0 
•286 
81 
6-98 
43 
5 b 
Greenwich. 
Seasons, 
1876-77. 
Pressure. 
Temperature. 
Tension 
of 
Yapour. 
Humi¬ 
dity. 
Eainfall. 
Cloud 
0 - 10 . 
Mean. 
Daily 
Eange. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter . 
29754 
43‘4 
9'9 
•245 
85 
11-90 
64 
7'3 
Spring ..... 
29797 
45*o 
157 
•232 
75 
6 - 8 o 
48 
6-5 
Summer. 
29-936 
61-3 
21-4 
•384 
71 
6 ’oo 
37 
5'4 
Autumn. 
29932 
49-0 
16-1 
•265 
81 
6-20 
43 
5-8 
