IX. 
METEOROLOGICAL OBSERVATIONS TAKEN AT WANSFORD 
HOUSE, WATFORD, DURING THE YEAR 1885. 
By John Hopkxnson, F.L.S., F.G.S., F.B.Met.Soc. 
Read at Watford , 1 Ith May , 1886. 
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. Barometer, 
a Fortin. Thermometers, dry-bulb, wet-bulb, Negretti maximum, 
and Butherford minimum, 4 feet above the ground in a Stevenson 
screen, over grass. Bain-gauge, Snowdon pattern, 5 inches in 
diameter, rim 1 foot above the ground. For further particulars 
the report for the year 1883* may be referred to. 
The monthly means and other results of the daily observations 
in 1885 are given in the accompanying tables (pp. 84, 85); and 
from these tables the following summary for the seasons (winter 
including Dec. 1884 from the previous report) is deduced, results 
for Greenwich Observatory being added for comparison as usual. 
Means for the Seasons from Dec. 1884 to Nov. 1885, at Watford. 
Seasons, 
1884-85. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud 
0 - 10 . 
Mean. 
Daily 
Range. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter ..... 
29-827 
39*2 
9*4 
•213 
90 
9*44 
57 
7.7 
Spring ..... 
29 -902 
45 ' 6 
16-6 
•231 
75 
7 *49 
41 
6 *o 
Summer..... 
30-070 
60-3 
I 9‘3 
•380 
7i 
3‘34 
28 
5*8 
Autumn..... 
29 -846 
47 ‘6 
12*8 
•291 
87 
ii*93 
61 
6-9 
The same at Greenwich. 
Seasons, 
1884-85. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud 
0 - 10 . 
Mean. 
Daily 
Range. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter . 
29-827 
40*5 
9’i 
•220 
87 
6-30 
52 
7*8 
Spring . 
29-891 
46*0 
18-1 
•238 
77 
5*65 
36 
b’3 
Summer..... 
3o*o55 
60-6 
22*1 
•381 
73 
3*49 
22 
5*9 
Autumn. 
29-830 
48-2 
13*4 
•301 
86 
9*98 
61 
7*4 
* 4 Trans. Herts Nat. Hist. Soc.,’ Vol. Ill, Part 5, p. 181. 
