XVIII. 
METEOROLOGICAL OBSERVATIONS TAKEN AT WANSFORD 
HOUSE, WATFORD, DURING THE YEAR 1886. 
By John Hopkinson, F.L.S., F.G.S., F.B.Met.Soc. 
j Read at Watford , 19th April, 1887. 
Longitude of Station, 0° 23' 40" W. ; Latitude, 51° 39' 45" N\ 
Ground-level at thermometer-stand and rain-gauge 223 feet, and 
cistern of Barometer 234 feet above Ordnance Datum. All the 
observations are taken at 9 a.m. Further particulars are given in 
the report for the year 1883.* 4 
This is the ninth annual report of my meteorological observations 
at Wansford House, and, owing to my removal to St. Albans at 
the end of the year to which it relates, it is my last annual report 
for Watford. The observations are continued at St. Albans. 
The monthly means and other results of the daily observations 
in 1886 are given in the accompanying tables (pp. 170, 171); and 
from these tables the following summary for the seasons (winter 
including Dec. 1885 from the previous report) is deduced, results 
for Greenwich Observatory being added for comparison as usual. 
Means eoe the Seasons eeom Dec. 1885 to JNov. 1886, at Wateoed. 
Seasons, 
1885-86. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud 
0-10. 
Mean. 
Daily 
Range. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter ..... 
30-016 
35*i 
97 
•180 
90 
5-64 
48 
7*9 
Spring . 
29-960 
46-5 
157 
•260 
81 
8-15 
52 
7'2 
Summer. 
29-986 
60-9 
18-9 
773 
74 
4*5o 
34 
6-2 
Autumn. 
29-932 
51-8 
I 4'3 
735 
88 
8-31 
49 
6-9 
The same at Geeenwich. 
Seasons, 
1885-86. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud 
0-10. 
Mean. 
Daily 
Range. 
Total. 
Days. 
ins. 
O 
O * 
in. 
% 
ins. 
Winter .... 
29-997 
36-2 
9-0 
•187 
87 
5*36 
45 
77 
Spring . 
29-941 
46-4 
17-0 
•253 
79 
6-62 
42 
7-1 
Summer. 
29-960 
60-9 
21-5 
798 
74 
4'°7 
32 
6-3 
Autumn. 
29-908 
52 -o 
14-6 
732 
85 
5^7 
39 
6-8 
* ‘ Trans. Herts. Nat. Hist Soc.,’ Vol. Ill, Part 5, p. 181. 
