( 213 ) 
XXI. 
METEOROLOGICAL OBSERVATIONS TAKEN IN HERTFORDSHIRE 
IN THE YEAR 1902. 
By Jornsr Hopexn-son, F.L.S., F.G.S., F.R.Met.Soc., Assoc.Inst. C.E. 
The Hertfordshire meteorological stations for the year 1902 
are the same as before, and the observations have been taken as 
usual. The hour of observation is 9 a.m. 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. Shade 
temperatures only are given; for Bennington, Berkhamsted, and 
St. Albans from thermometers in Stevenson screens, and for New 
Barnet from thermometers under a Glaisher stand. 
Information as to the stations is given in my paper on “The 
Climate of Hertfordshire,” and particulars as to the averages with 
which the results are compared are given in my previous report. 
(See pp. 125-126 and 145 of this volume.) 
Table I.— Results of Climatological Olservations taken in 
Hertfordshire in the Year 1902. 
Stations 
Temperature of the Air 
Humidity 
Cloud, 0-10 
Rain 
Means 
Extremes 
Amount 
<S* 
p 
Mean 
Min. 
Max. 
Range 
Min. 
Max. 
O 
O 
0 
O 
0 
O 
% 
ins. 
Bennington . 
477 
40-8 
54-6 
13-8 
i6-i 
83*0 
82 
7-6 
17*94 
185 
Berkhamsted. 
48-0 
40 5 
55-6 
i5‘i 
14-0 
83-9 
82 
7'5 
20-11 
167 
St. Albans. 
48-0 
41-4 
54-6 
13-2 
15-0 
833 
82 
7-2 
21 *24 
169 
New Barnet . 
48-1 
38-8 
57*3 
i 8‘5 
7-0 
84-8 
82 
6-8 
20-47 
149 
County. 
48-0 
40-4 
55’5 
I 5' 1 
7-0 
84-8 
82 
7*3 
19-94 
168 
In the year 1902 the mean temperature was 0-3° below the 
average of that of the twelve years 1887-98. The mean daily 
range was O’8° below the average of that of the five stations from 
the returns of which the mean for that period was deduced, owing 
entirely to the lower temperature of the days. The air, at 9 a.m., 
was of average humidity. The sky, at the same hour, was con¬ 
siderably more cloudy than usual. The sun shone on the average 
for nearly an hour a day less than usual. The rainfall was small, 
hut there was more than the average number of rainy days. 
Westerly winds greatly prevailed, and south-westerly were the 
next in frequency. 
Compared with the average, January was a very warm month, 
and March was also warm; May was very cold, and so was 
February, being 6° colder than January and nearly 10° colder 
than March; and June also was cold. The air was very humid 
VOL. XI.—PART VII. 
16 
