86 
J. HOPKINSON—METEOROLOGICAL OBSERVATIONS 
In the report for the year 1883, already alluded to, the means of 
some of the principal results of observations taken during the five 
years 1878-82 are given. In the following table the period of 
observation is extended to include the year 1885, thus giving the 
means for eight years, and this is followed by a table giving the 
difference in 1885 from the means of these eight years. 
Means oe Observations taken at Wansford House, Watford, 
1878-85. 
Months. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud 
0 - 10 . 
Mean. 
Daily 
Range. 
Total. 
Days. 
ins. 
O 
O 
in. 
% 
ins. 
January. 
30-098 
36-1 
97 
•190 
89 
2-16 
14 
7-6 
February 
29-934 
40*2 
io -8 
•219 
89 
2*89 
18 
7*6 
March . 
30-015 
4i-5 
15-2 
•210 
82 
1 51 
12 
6 *i 
April. 
29-990 
46-1 
16-6 
•242 
77 
2-40 
14 
6*2 
May . 
29-977 
52-5 
18-4 
•292 
7i 
2-15 
14 
6*2 
June . 
29-958 
58-4 
17*3 
*371 
74 
3-24 
16 
6-6 
July . 
29-923 
61-4 
I 7 ’ 2 
•410 
74 
2‘54 
15 
6*6 
August . 
29-925 
6i-i 
16-0 
•418 
77 
270 
12 
7-0 
September 
29-951 
56-8 
i6-i 
• 38 S 
83 
2-91 
14 
6-4 
October. 
29-933 
477 
13-1 
•288 
87 
3-i3 
1 7 
6-6 
November 
29-940 
41-7 
ii*7 
•233 
88 
2 -91 
19 
6-5 
December 
29-987 
37-2 
IO'O 
•199 
90 
2-45 
16 
7'3 
Year . 
29-969 
48-4 
H'3 
00 
00 
82 
30-99 
181 
67 
Difference in 1885 from: means of 1878-85, at Watford. 
Months. 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
Rainfall. 
Cloud 
0 - 10 . 
Mean. 
Daily 
Range. 
dity. 
Total. 
Days. 
in. 
O 
O 
in. 
% 
ins. 
January. 
—*i 88 
— 0-7 
- 0-9 
—*004 
4-2 
4 - 0-89 
+ 3 
-l-i-o 
February 
—•232 
-\~2 "2 
+ 0-4 
+•019 
4 - 1 
+ 0-13 
+ 3 
—o-5 
March ..... 
+-077 
— I '6 
+o*3 
—*oi 8 
— I 
4 - 0-29 
— 5 
—o -8 
April. 
-•185 
+i-3 
+i-3 
— -002 
—4 
-l-o-25 
—O'l 
May . 
—•168 
—3-i 
— 2'0 
—•032 
+1 
-j-o -89 
+~6 
+o‘3 
June . 
+•089 
-}-o-9 
+2 7 
-f --002 
—3 
— 1-32 
— 6 
— 2-0 
July . 
+•265 
+i*9 
+4*1 
— •003 
-5 
— 2-22 
— 9 
— 1*4 
August . 
+•050 
— 2*8 
-j-o "6 
—-°5° 
—5 
—i* 6 o 
= 
-fo-7 
September 
—•051 
—i -8 
-l-o-4 
—-025 
4 - 1-19 
4- 6 
4 - 0-4 
October. 
—-206 
— 2-3 
— i-i 
—•031 
— 1 
+ 1*01 
4- 2 
—o-i 
November 
— •030 
-fo -7 
—17 
+•019 
+5 
4 - 0-78 
+ 3 
4 - 1-0 
December 
-f -'226 
+°’S 
+1 
— 1-26 
—- 1 
— 0-3 
Year . 
— •029 
— 0-4 
+o*4 
—-oio 
—1 
~o'97 
4 - 2 
— O-I 
