46 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



The prevailing winds were from between south and west. 

 The average velocity of the wind was 7 miles an hour. 



There were 192 hours of bright sunshine, equal to 40 per cent, of the greatest 

 possible amount. There were but 3 days on which no sunshine was recorded. 



June. — The weather of June was generally fine, with a good deal of 

 sunshine and less rain than the average. A cool northerly wind which 

 was experienced about the 5th and 6th brought the temperature down 

 somewhat, and there was some changeable weather towards the middle 

 of the month, but this was followed by warm summer-like weather which 

 lasted till the close. The amount of rain which fell was in most places 

 less than the average, the amount recorded at Wisley being only 1*72 

 inches, of which 0*71 inch fell in one day, and it was only on six days 

 that there was any rain to measure. The amount of bright sunshine was 

 generally above the average, and exceeded 280 hours at several places in 

 the south of England. A violent squall, which, however, was of very 

 limited area, was experienced in the Thames valley in the course of the 

 night of the 1st, and did a considerable amount of damage to small trees 

 in Bushey Park and elsewhere ; and another of somewhat similar character 

 visited North Herts on the afternoon of the 4th, in thundery weather, 

 and travelled in a S.S.E. direction for about six miles, scattering 

 hayricks, overturning loaded carts, and levelling trees and other obstacles 

 in its path. The temperature of the soil one foot below the surface 

 increased during the month 4J°. 



Observations made at Wisley : 



Mean temperature of the air in shade 59 0, 4 



Highest „ „ „ 80°-6 on the 4th 



Lowest „ „ „ 37°'2 „ 7th 



Lowest „ on the grass 29°-l „ 22nd 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 60°'6 60°-l 56°-3 



Highest „ „ „ 63°-7 62°-l 58°-0 



Lowest „ „ „ 58°-4 58°-2 53°-8 



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



represented by 100) 71% 



Rain fell on 6 days to the total depth of 1'72 in. 



(Equivalent to nearly 8£ gallons of water to the square yard.) 



Heaviest fall on any day 0-71 in. on the 1st 



The prevailing winds were from north-east and north. 

 The average velocity of the wind was 5 miles an hour. 



There were 266 hours of bright sunshine, equal to 55 per cent, of the greatest 

 possible amount. There were no entirely sunless days. 



July. — The fine weather with which June closed continued during the 

 opening days of July and produced some high readings of the thermo- 

 meter over all the central parts of England and even in many parts of 

 Scotland. After the first few days, however, a change took place to un- 

 settled weather, a good many small depressions passing across the 

 country bringing with them rain, which in some districts was very heavy 

 and lowered the temperature considerably. The wet weather ceased 

 about the 18th, and from that day to the close of the month no rain fell 

 at Wisley. The fall of rain was, however, patchy, some districts having 

 much less than the average, whilst others, as for example the north-west 



