( 145 ) 
XVII. 
METEOROLOGICAL OBSERVATIONS TAKEN IN HERTFORDSHIRE 
IN THE YEAR 1901 . 
By Johh Hopkihsoh, F.L.S., F.G.S., F.R. Met. Soc., Assoc.Inst. C.E. 
There is no alteration in the Hertfordshire meteorological 
stations for the year 1901, and the observations have been taken 
as heretofore. The hour of observation is 9 a.m., and all the 
records are entered to the same day except those of the maximum 
temperature and the rainfall, which are entered to the previous day. 
At Bennington, Berkhamsted, and St. Albans the thermometers for 
registering the shade-temperature are in Stevenson screens; at 
New Barnet they are under a Glaisher stand, which accounts for 
the greater range of temperature there than at the other stations, 
while the mean temperature shows no divergence. 
The averages with which the results of these observations are 
compared are those of the same four stations and Royston for the 
twelve years 1887-98, as given in my paper on “The Climate of 
Hertfordshire,”^ except the sunshine, which is compared with the 
average at Berkhamsted for the same period combined with that at 
Bennington for the ten years 1889-98,f and the rainfall, which 
is compared with the county average for the 60 years 1840-99. J 
The remarks on the prevailing direction of the wind refer to 
observations at Berkhamsted and Bennington (the means of the 
two), as tabulated in the ‘ Meteorological Record ’ of the Royal 
Meteorological Society, from which invaluable publication the 
sunshine records and other data in this report are derived. 
Table I .—Results of Climatological Observations taken in 
Hertfordshire in the Year 1901. 
Stations 
Temperature of the Air 
Humidity 
Cloud, 0-10 
Rain 
Means 
Extremes 
Amount 
o 3 
P 
Mean 
Min. 
Max. 
Range 
Min. 
Max. 
O 
O 
0 
O 
O 
O 
% 
ins. 
Bennington . 
48-2 
40-6 
55'9 
I 5*3 
i 6 *i 
8yo 
80 
7-0 
19*53 
165 
Berkhamsted. 
48-3 
40 0 
56 b 
16-6 
15-9 
877 
81 
6-9 
23-66 
142 
St. Albans. 
48 '2 
40-8 
55’5 
147 
17-8 
87-5 
79 
6*5 
22-57 
147 
New Barnet . 
48-3 
38'o 
58-5 
20 5 
90 
91 - o 
82 
57 
20-42 
123 
County. 
48-2 
39-8 
566 
16-8 
9-0 
91*0 
80 
6-5 
2 i *55 
144 
In the year 1901 the mean temperature was about the average 
of that of the twelve years 1887-98, and a degree lower than in 
* Ante, pp. 127 - 131 . t lb., p. 133 . % lb., p. 132 . 
VOL. XI.—PART V. 
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