TAKEN AT ST. ALBANS IN’ 1887 . 
191 
on 5th Jan. and 28‘820 ins. on 3rd Not., and the highest pressure 
was 30*863 ins. on 7th Feb., giving a range of 2*043 ins. The 
mean temperature of the year was very low, and on the 2nd of 
January the low minimum of 13°*7 was recorded. The mean daily 
range was rather high, the rainfall was very small, the rainy days 
were few, and the air was generally rather dry, May only showing 
a considerable degree of humidity. 
In the winter of 1886-87 (Dec. to Feb.) the mean pressure of 
the atmosphere was rather high and the mean temperature was 
low. In the spring (March to May) mean pressure was high, mean 
temperature very low, relative humidity great, and rainfall rather 
small. In the summer (June to Aug.) mean pressure was very 
high, mean temperature high (the daily range being great), relative 
humidity very low, and rainfall very small. In the autumn (Sept, 
to Nov.) mean temperature was very low. No mention is here 
made of any phenomena about the average. The deviations from 
the means of our period are as follows :— 
Difference in 1886-87 from Means of 1877-86 at 'Watford. 
Seasons, 
Pressure. 
Temperature. 
Tension 
of 
Vapour. 
Humi¬ 
dity. 
Rainfall. 
Cloud. 
1886-87. 
Mean. 
Daily 
Range. 
Total. 
Days. 
0 - 10 . 
Winter . 
Spring . 
Summer. 
Autumn..... 
ins. 
+*°44 
+ •109 
+•145 
—*019 
O 
— i*9 
—3-i 
+ 2*1 
— 3 -o 
O 
+i *6 
+T9 
—i *6 
in. 
—*017 
— *019 
—*019 
— *041 
% 
— 0 
+ 5 
— 9 
— 1 
ins. 
— 0*79 
- 1*41 
-5-4i 
—o*55 
— 8 
+ 4 
— 21 
+ 3 
—o*3 
+o *6 
—17 
+ 0*1 
Notes on the Months. 
January.— Yery cold and dull, with an atmosphere of average 
humidity and pressure, and a small amount of rain chiefly falling 
in the form of snow. Coldest day 2nd, mean 23°*7 ; warmest day 
29th, mean 45°*3. Min. below 32° on 20 days (every day from 1st 
to 11th), below 22° on 5 (above 40° on 29th); max. above 42° on 
11 (below 32° on 13th and 16th). 
February. —Yery cold, bright, with an atmosphere of average 
humidity and very high pressure, and a very small amount of rain 
with no snow. No rain fell from 4th to 16th (13 days). Coldest 
day 17th, mean 2 9°*4 ; warmest day 4th, mean 49°*3. Min. below 
32° on 17 days, below 22° on 1 (17th) ; max. above 42° on 18, 
above 52° on 1 (5th). 
March.— Yery cold, rather dull, with a rather humid atmo¬ 
sphere of considerable pressure, and an average amount of rain 
chiefly falling as snow, on 15th to the depth of 6 inches (measuring 
0*41 in. of rain). No rain fell from 25th Feb. to 10th March 
(14 days). Coldest day 4th, mean 30°*3 ; warmest day 27th, mean 
49°*4. Min. below 32° on 18 days (all before 23rd), below 22° on 
1 (14th); max. above 52° on 3 (27th, 28th, and 29th). 
