42 



JOURNAL OF THE EOYAL HORTICULTURAL SOCIETY, 



Observations made at Wisley : 



Mean temperature of the air in shade 36°\3 



Highest „ „ „ 53°-5 on the 27th 



Lowest „ „ „ 15°-7 „ 6th 



Lowest „ on the grass 9°-2 „ 4th and 12th 



At l ft. At 2 ft. At 4 ft. 

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 36°*9 39°-3 41°-9 



Highest „ „ „ 41°-7 41°-8 44°-3 



Lowest „ „ „ 33°-9 37°-0 40°-7 



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



represented by 100) 92% 



Rain fell on 10 days to the total depth of ... 1*55 in. 



(Equivalent to about 1\ gallons of water to the square yard.) 

 Heaviest fall on any day ... ... ... ... ... ... 1-26 in. on the 7th 



The prevailing winds were from between south and west. 

 The average velocity of the wind was 1\ miles an hour. 



There were 58 hours of bright sunshine, equal to 23 per cent, of the greatest 

 possible amount. There were 13 days on which no sunshine was recorded. 



February. — The weather of February was marked by a persistence 

 of westerly winds, which during the latter half of the month frequently 

 attained considerable strength, and were accompanied by a good deal of 

 wet weather. It was, however, warmer than February usually is, but 

 whilst there were no very severe frosts neither were there any very warm 

 days, so that there was but a moderate range of temperature. The coldest 

 period occurred at the close of the second week, when the screened 

 thermometer in the gardens fell to 22°, but at the close of the month 

 a keen cold wind with squalls of rain, and in many places of hail and 

 snow, occasioned a spell of weather which, although not so cold, was 

 perhaps more generally disagreeable. The rainfall was below the average 

 over the southern half of the kingdom, but rather above it in the north. 

 At Wisley the fall, which was spread over fifteen days, only amounted 

 to 0*85 inch, and in many districts it was less than an inch. The distri- 

 bution of bright sunshine was peculiar, since the largest amounts were 

 recorded over the north-eastern districts and the smallest in the west. 

 At Wisley the total duration was eighty hours, and at many places in 

 the west, which usually have the largest amounts, less than 50 hours were 

 registered, whilst in Northumberland and on the east coast of Scotland 

 the total ranged from 100 to 111 hours. 



Observations made at Wisley : 



Mean temperature of the air in shade ... ... ... ... 41°-o 



Highest „ „ „ ... 53°-8 on the 17th 



Lowest „ „ „ 22°-0 „ 13th 



Lowest ,, on the grass 21°-4 „ 13th 



At l ft. At 2 ft. At 4 ft. 

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 39°'6 41°-3 42°-2 



Highest „ „ „ 43°-l 43°-2 43°-l 



Lowest „ „ „ 36°-l 39°-l 41°-2 



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



represented by 100) 88% 



Rain fell on 15 days to the total depth of - 0*85 in. 



(Equivalent to about 4 gallons of water to the square yard.) 

 Heaviest fall on any day 0-21 in. on the 16th. 



