XX. 
METEOROLOGICAL OBSERVATIONS TAKEN AT THE GRANGE, 
ST. ALBANS, DURING THE YEAR 1890 . 
Ey John Hopkinson, F.L.S., F.G.S., F.E.Met.Soc., President. 
Read at Watford, \Qth March, 1891 . 
Longitude of Station, 0° 20' 7" W. ; Latitude, 51° 45' 9" N. 
Cistern of barometer 388 feet, ground-level at thermometer-screen 
380 feet, and at rain-gauge 379 feet, above Ordnance Datum. 
Thermometers 4 feet, and top of rain-gauge 1 foot above the ground. 
Observations taken at 9 a.m. 
The accompanying tables (pp. 170, 171) give the monthly means, 
etc., of the daily observations in 1890, and the following is the 
usual summary for the seasons. 
Means for the Seasons prom Dec. 1889 to Nov. 1890. 
Seasons, 
1889 - 90 . 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud, 
0-10. 
Mean. 
Daily- 
Range. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
Winter . 
30-125 
38-0 
io # 9 
•204 
91 
5’ 11 
50 
6-6 
Spring . 
29-856 
47-o 
i6-o 
’264 
80 
5'35 
45 
7-2 
Summer. 
29*942 
58-5 
15-8 
•284 
79 
8-91 
56 
6-8 
Autumn. 
30-058 
50-1 
15-6 
•317 
87 
4-62 
42 
6-7 
In the next table the chief results, monthly and annual, are 
compared with the means for ten years at Watford. 
Difference in 1890 from Means of 1877-86 at Watford. 
Temperature. 
Tension 
Humi¬ 
Rainfall. 
Cloud, 
Months. 
Pressure. 
Mean. 
Daily 
Range. 
of 
Vapour. 
dity. 
Total. 
Days. 
0-10. 
January. 
in. 
—-089 
O 
+ 4-6 
O 
4~2-0 
in. 
4-'°35 
To 
ins. 
+ 0'35 
+ 5 
—i’i 
February 
+ •273 
— 3*3 
—o-i 
— •032 
= 
— i-8o 
— 8 
—1*2 
March . 
— *118 
-f 1 *3 
4 - 0-2 
4--027 
+ 2 
4-1-oi 
+ 4 
4-o - 8 
April. 
—*030 
+i‘o 
4-o-i 
— -012 
+ 2 
-1-05 
+ 1 
-fi ’5 
May . 
—*101 
+i -5 
+0-3 
4--032 
+ 5 
—1-06 
— 2 
June . 
+'035 
—0-9 
1-9 
— -OOI 
+ 5 
— O’lO 
+ 4 
4-0-9 
July . 
— 037 
—2*2 
—21 
— -019 
+ 5 
4-1-64 
+ 4 
4-09 
August . 
— -024 
—2*1 
-0-3 
— *020 ‘ 
+ 4 
—0*64 
+ 5 
—0-2 
September 
+•203 
+ 2’7 
4-19 
+ '045 
+ 1 
—2-02 
— 6 
4-i-i 
October .... 
+ ■191 
+0-7 
4 - 2 7 
+ 1 
— I‘6l 
— 4 
— 0’2 
November 
—•032 
+0-3 
+0-3 
— •003 
— 1 
“ 0*44 
+ 4 
—O’l 
December 
4--ioi 
—8-6 
13 
— -065 
“ 3 
—1-97 
— 3 
+o *3 
Year . 
+•031 
-0-4 
—0*1 
—-ooi 
+ 2 
-7*69 
+ 4 
-fo'2 
