REPORT ON METEOROLOGICAL OBSERVATIONS, YVTSLEY, 1914. 77 



damage ; even in inland districts it reached quite unusual strength, as 

 in North-east Surrey, where a gust velocity of 70 miles an hour was 

 recorded. These winds accompanied deep cyclonic systems which 

 swept over the country from the south-west, and coming from the 

 warmer regions of the Atlantic they brought with them the abnormal 

 warmth and rainfall experienced. As evidence of the mildness of 

 the weather, many flowers were in full bloom at Wisley at an unusually 

 early date — amongst others, Narcissi of various kinds ; flowering trees 

 and shrubs were, however, somewhat later this year than in 19 13. 



J AN FEB MAR APL MAY JUN JUL AUG SEP OCT NOV DEC 



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Fig. 38. — Mean Temperatures of Air and Soil throughout the Year. 



The Wisley daily meteorological observations give the results 

 shown in the following table : — 



Mean temperature of the air in shade . . . .44-4° 



Highest ,, 57 0 on the 14th 



Lowest 27 0 ,, 27th 



Lowest on the grass . . . . .19° 28th 



Number of nights of ground frost . . . . . . . .19 



At depth of 



1 ft. 2 ft. 4 ft. 



Mean temperature of the soil at 9 a.m. . . . 42 0 43 0 43 0 



Highest „ „ „ . . 47° 45° 44° 



Lowest „ „ „ „ 39 0 41 0 42 0 



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

 sented by 100), 90 per cent. 



Rain fell on 15 days, to the total depth of 3-36 in. (equivalent to about 15I 

 gallons of water to the square yard). Heaviest fall on any day 0-58 in., on the 

 21st. 



The prevailing winds were southerly. 



The average velocity of the wind was 9 miles an hour. 



There were 89 hours of bright sunshine, equal to 32 per cent, of the greatest 

 possible amount. 



There were 7 days on which no sunshine was recorded. 



