( 255 ) 
XX YI. 
THE WEATHER OF THE YEAR 1910 IX HERTFORDSHIRE. 
By John Hopkinson, F.L.S., F.G-.S., F.Z.S., F.R.Met. Soc., 
Assoc. Inst. C.E. 
Bead at Watford, 21th March, 1911. 
The Climatological Stations in the county are the same as in 
the three previous years, and the rainfall stations of which the 
records are given in the principal table are the same in number 
as in the previous year, namely 54, although there are several 
changes. The daily rainfall has been received from all. 
For various reasons Melbourne Street, Royston; Little 
Callipers, Chipperfield; G-orhambury, St. Albans; Aldenham 
House, Elstree; and Therfield Rectory are omitted from this 
table. In their place are inserted Roxley Court, Willian; 
Offley Vicarage; Bushey Hall Road, Watford ; and West Lodge 
and Dollis Hill, Totteridge. 
The supplementary rainfall table gives the annual fall of rain 
collected by 20 other gauges in the county : 5 of these are those 
of additional gauges at stations at which the rainfall is given in 
the principal table ; 5 are omitted from that table on account of 
their incompleteness or because the daily fall has not been 
received; and 10 are from ‘ British Rainfall,’ 1910. 
The hour of observation is 9 a.m. at all stations but one at 
which the rainfall is taken at 10 a.m., and all observations are 
entered to the same day, except those of rainfall and of maximum 
temperature, which are entered to the previous day. Temperature 
in the shade only is given, at all stations from thermometers in 
Stevenson screens. The results are compared with the averages 
for the twenty years 1887-1906 ; the rainfall with the average 
for the seventy years 1840-1909. 
The year 1910 was rather warm, the air was rather more 
humid than usual, the sky more cloudy, and the rainfall heavy 
and much more frequent than usual. 
The mean temperature of the year was 48‘7°, or 0’3° above 
the average ; the mean daily range was 14T°, or O’7° above the 
average. The mean rainfall at the 54 stations was 28’95 ins., 
being 2’90 ins. above the average for the 70 years 1840-1909. 
The mean number of days on which rain fell was 192, being 22 
more than the average for the 40 years 1870-1909. 
Compared with the average, September was rather cold, July 
and November were very cold; January, March, May, and June 
were rather warm, February, October, and December very warm. 
The air was rather dry in March and November, rather humid 
in June, August, and October, very humid in May, and 
excessively humid in July. The sky was bright in January, 
February, and November, and very bright in March; it was 
cloudy from April to October, being very cloudy in July and 
VOLl XIV.—PART IV. 
17 
