METEOROLOGICAL OBSERVATIONS AT WISLEY EN 190-5. 173 



At 1 ft. At 2 ft. At i ft 

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 53°.4 52°.9 50°.4 



Highest „ „ 60~\2 57".9 53 2 .2 



Lowest „ „ „ 49^.6 49 3 .6 47°.7 



Mean relative humidity of the air at 9 ajn. (complete saturation being 



represented by 100) * 64 



Rain fell on 7 days to a total depth of 0-48 in. 



(Equivalent to rather more than 2£ gallons of water per square yard.) 



Heaviest fall on any day 0*14 in. on the 16th 



The prevailing winds were northerly and westerly. 



The average velocity of the wind was 5| miles per hour. 



There were 258 hours of bright sunshine, equal to 54 per cent, of the total possible 

 amount, and only on one day — the 14th — was no sunshine recorded. 



June. — The weather of this month, was very varied, and presented 

 some striking contrasts at the same place during different periods, and 

 between different places at the same moment. 



The winds blew with nearly equal frequency from all points of the 

 compass, but they were usually of moderate force and rarely exceeded 

 that of a strong breeze. The mean temperature differed very little from 

 the normal, but as a rule was slightly above it ; its range, however, was 

 generally large, and in some places in the northern half of the kingdom 

 it amounted to nearly 50°. Rainfall was excessive over the southern 

 counties of England, but was deficient in the north and over Ireland ; and 

 whilst in the north of England rain fell on but four or five days, it did so 

 in the south on nearly three days out of every four all through the month. 

 Sunshine was, as might have been expected, very deficient over the rainy 

 southern portions of the country, but abnormally abundant in the north. 



Observations made at Wisley : 



Mean temperature of the air in shade ... ... ... ... 59 -.4 



Highest „ „ „■ 77°. 9 on the 27th 



Lowest „ „ „ 45°.0 „ 15th 



Lowest „ on the grass 37°.8 ., 15th 



At 1 ft. At 2 ft. At 4 ft. 

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m. ... 60 c .O 59 3 .0 55 3 .6 



Highest „ „ „ 64°.l 62°.6 58~.6 



Lowest „ „ „ 54°. 5 55°. 2 53°. 6 



Mean relative humidity of the air at 9 a.m. (complete saturation being 



represented by 100) 79 



Rain fell on 17 days to the total depth of 4-60 ins. 



(Equivalent to about 19 gallons of water per square yard.) 



Heaviest fall on any day 1 "25 in. on the 5th 



The prevailing winds were from north and north-east. 

 The average velocity of the wind was ok miles per hour. 



There were 154 hours of bright sunshine, equal to 31 per cent, of the total possible 

 amount, and there were 5 sunless days. 



July. — This was a quiet, warm and dry month, with a full average 

 amount of sunshine. There were a few thunderstorms, which, however, 

 were seldom severe. One which occurred in Hertfordshire on the 9th 

 was accompanied by heavy hail and rain, and did much damage to fruit 

 and gardens generally. 



Winds were chiefly of a westerly type, and as a rule were moderate 

 or light in strength. Temperature was higher than usual all over the 



