6o JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY, 



country generally, and the south-eastern counties of England in par- 

 ticular, had far less, some parts of the latter district getting an average 

 of less than three hours a day. 



The results from the Wisley records are as follows : 



Mean temperature of the air in shade . . . • 59"3° 



Highest „ „„„.... 75° on the 29th 



Lowest ,, ,,„,,.... 43° „ 8th 



Lowest ,, on the grass . . . . . 32° „ 8th 



Number of nights of ground frost ........ i 



At depth of 

 I ft. 2 ft. 4 ft. 



Mean temperature of the soil at 9 a.m. . . . 61-5° 60-3° 57'9° 

 Highest „ „ „ „ ... 65° 61° 58° 



Lowest „ „ „ „ ... 60° 59° 58° 



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

 represented by 100), 80 per cent. 



Rain fell on 11 days, to the total depth of 1*70 in. (equivalent to about 8 

 gallons of water to the square yard). Heaviest fall on any day 0-72 in., on the 

 14th. 



The prevailing winds were northerly. 



The average velocity of the wind was 4 miles an hour. 



There were 120 hours of bright sunshine, equal to 24 per cent, of the greatest 

 possible amount. 



There were 4 days on which no sunshine was recorded. 



August. — This was another very dry month, and also a cool one, 

 with less than the average amount of bright sunshine over the greater 

 part of the kingdom, the exception being Ireland and a part of the 

 north-western coasts, where the record of sunshine exceeded the 

 average. It was, however, a quiet nionth as regards wind, and there 

 were no unusual phenomena of interest to note. At Wisley the 

 temperature rarely rose above 70°, and only once — and that near the 

 close of the month — did it reach 80°. At night the temperature upon 

 the ground several times fell perilously near to the freezing point, and 

 once it actually touched it ; but in the screen, four feet above the ground, 

 the lowest point reached was 40°. Rainfall was even less abundant 

 than in July, and the totals, such as they were, were largely due to 

 exceptional downpours accompanying thunderstorms; but in many 

 districts there was an entire absence of rain for periods of thirty days 

 or thereabout, from July on to well towards the close of August, 

 and whilst in few districts did the total fall amount to so much as 

 two inches, in many it was less than an inch. Winds from northerly 

 points of the compass were unusually prevalent throughout the month. 



The Wisley records show : 



Mean temperature of the air in shade 



. 60-5° 





Highest „ „ „ „ . . 



. 81° on the 



28th 



Lowest ,, ,, . . 



. 41° „ 



26th 



Lowest ,, on the grass 



: . . 32° „ 



26th 











At depth of 







I ft. 2 ft. 



4 ft. 



Mean temperature of the soil at 9 a.m. 



. 6l-I° 60-5° 



58-5 



Highest 



. 63° 61° ^ 



59'' 



Lowest „ „ ,, „ 



. 60° • 60** 



58^ 



