48 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



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

 deep. deep. deep. 



Mean temperature of the soil afc 9 a.m 62°-8 62°-5 59°"3 



Highest „ „ „ 65°-6 64°-2 60°-6 



Lowest „ „ „ 58°-9 60°-l 58°-l 



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



represented by 100) 75% 



Rain fell on 11 days to the total depth of • 1-85 in. 



(Equivalent to about 8J gallons of water to the square yard.) 



Heaviest fall on any day 0*59 in. on the 16th 



The prevailing winds were from south-west and west. 

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



There were 202 hours of bright sunshine, equal to 41 per cent, of the greatest 

 possible amount. There were no entirely sunless days. 



August. — The winds throughout a great part of this month were from 

 west, north-west or north, and consequently cool, so that there was an 

 entire absence of very hot days, although the weather was generally fine 

 and dry. The nights were warm, except for a short interval in the middle 

 of the month, when the grass thermometer fell to 35° at Wisley, and- to 

 below the freezing point at several places further north. After the third 

 week the character of the weather entirely changed and a succession of 

 disturbances passing across the kingdom brought with them unsettled, 

 showery weather, and in some parts heavy rain. On the whole the 

 month was a sunny one, Wisley having very nearly 50 per cent, of the 

 possible amount, and many places on the south coast having upwards of 

 60 per cent. The frequency of rain varied a good deal in different 

 localities, but whilst the fall was deficient over the northern half of the 

 kingdom and in Ireland, it exceeded the average over the southern 

 counties. 



Observations made at Wisley : 



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



Highest „ „ „ 81°-2onthe 3rd 



Lowest „ „ „ ,. ... 41°-0 „ 17th 



Lowest „ on the grass 35°*0 „ 17th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 61°-8 62°-5 60°-7 



Highest „ „ „ ... 66°-6 64°-7 61°-6 



Lowest „ „ „ 57°-7 60°-0 59°'5 



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



represented by 100) 74% 



Rain fell on 14 days to the total depth of 3-18 in. 



(Equivalent to about 15 gallons of water to the square yard.) 



Heaviest fall on any day 104 in. on the 23rd 



The prevailing winds were from between south-west and north. 

 The average velocity of the wind was 6 miles an hour. 



There were 215 hours of bright sunshine, equal to 48 per cent, of the greatest 

 possible amount. There were but 2 days on which no sunshine was recorded. 



September— Generally speaking, the weather was unsettled and 

 changeable all through the month, the temperature varying considerably, 

 but being on the whole lower than the average until the close of the 

 month, when a spell of warm summer-like weather set in. At the 

 beginning of the month, with a cool northerly wind, the thermometer very 

 generally failed to reach 55°, whilst at its close it rose to 77° at Wisley, 



