METEOROLOGICAL OBSERVATIONS AT WISLEY IN 1907. 521 



they were accompanied by heavy falls of hail; in places fogs were of some- 

 what frequent occurrence. 



Observations made at Wisley : 



Mean temperature of the air in shade ... ... ... ... 59 o- 0 



Highest „ „ „ 78°-3 on the 20th 



Lowest „ „ „ 39°-3 „ 11th 



Lowest ,, on the grass • 34°-l ,, 11th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 60°-2 60°-l 57°-0 



Highest „ „ „ 63°-6 62°-5 59°'0 



Lowest „ „ „ 56°-2 57°-6 55°-5 



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



represented by 100) 75% 



Rain fell on 13 days to the total depth of ... ... ... ... I'll in. 



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



Heaviest fall on any day 0*21 in. on the 21st 



The prevailing winds were from south-west and west, but north-east winds were not 



infrequent. 



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



There were 197-5 hours of bright sunshine, equal to 40 per cent, of the greatest 

 possible amount. There was no day on which bright sunshine was not recorded. 



August. — This was another month of cool changeable weather with an 

 absence of anything in the way of hot summer temperature. The fall of 

 rain was in excess of the average in the north, but below it over the rest 

 of the kingdom, and the record of bright sunshine was less than the 

 normal everywhere. Fogs were again rather frequent in places, and the 

 winds were not very strong. 



Observations made at Wisley : 



Mean temperature of the air in shade ... ... ... ... 59 0, 9 



Highest „ „ „ 75°-0 on the 4th 



Lowest „ „ „ 44°-2 •„ 28th 



Lowest ,, on the grass ... ... ... ... ... 36°-l ,, 1st 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 60°-8 61°-4 58°-9 



Highest „ „ „ 63°-2 62°-7 59°-2 



Lowest „ „ „ 58°-7 60°-3 58°-5 



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



represented by 100) 76% 



Rain fell on 13 days to the total depth of 2-82 in. 



(Equivalent to about 13 gallons of water per square yard.) 



Heaviest fall on any day 1'06 in. on the 17th 



The prevailing winds were south-westerly and westerly. 

 The average velocity of the wind was miles per hour. 



There were 190-3 hours of bright sunshine, equal to 43 per cent, of the greatest 

 possible amount. There was but 1 day on which no sunshine was recorded. 



September. — The weather of this month presented a very marked but 

 welcome contrast to the dull. and ccol weather which had prevailed 

 throughout the five months which preceded it. The temperature was 

 upon the whole rather above the average ; the rainfall was everywhere 

 small, and in many districts no rain fell for periods varying from fifteen 

 to twen ty- five days ; the amount of bright sunshine recorded was generally 



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