520 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Observations made at Wisley : 



Mean temperature of the air in shade 52 a o 



Highest „ „ „' 75°-3 on the 12th 



Lowest „ „ „ ... 32°-8 „ 19th 



Lowest „ on the grass 27°-6 „ 19th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 53°-0 52°-8 50°-4 



Highest „ „ „ 58°-7 56°1 52°-7 



Lowest „ » „ 46°-3 47°-8 47°-7 



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



represented by 100) 73% 



Rain fell on 1G days to the total depth of... ... ... ... ... 2-05 in. 



(Equivalent to about 9| gallons of water per square yard.) 



Heaviest fall on any day ... 0-66 in. on the 31st 



The prevailing winds were northerly and easterly. 

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



There were 160" 6 hours of bright sunshine, equal to 34 per cent, of the greatest 

 possible amount. There were only 4 days on which no sunshine was recorded. 



June. — The cold and wet weather which characterised the months of 

 April and May continued throughout June. The weather was almost 

 continuously unsettled, with frequent high winds, low temperature for the 

 time of the year, less than the usual amount of bright sunshine, and an 

 excess of rain. Thunderstorms were not infrequent, and at a few places 

 in the north snow fell on midsummer day. Generally speaking there was 

 less sunshine in June than in March, and at Wisley the amount recorded 

 in the later month was only 82 per cent, of that recorded in March. 



Observations made at Wisley : 



Mean temperature of the air in shade 56 0- 6 



Highest „ „ „ .'. 72°-6 on the 9th 



Lowest „ „ „ 43°-l „ 17th 



Lowest „ on the grass 37°'0 29th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 57°-2 57°-0 54°3 



Highest „ „ „ 59°-0 58°-4 55°-4 



Lowest „ „ „ 53°-4 54°5 52°-8 



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



represented by 100) 76% 



Rain fell on 19 days to the total depth of 186 in 



(Equivalent to about 8f gallons of water per square yard.) 



Heaviest fall on any day ... 0 50 in. on the 1st 



The prevailing winds were south-westerly and westerly. 

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



There were 163 hours of bright sunshine, equal to 33 per cent, of the greatest 

 possible amount. There was only 1 day on which no sunshine was recorded. 



July. — The weather of this month showed a distinct improvement 

 upon that of the three which immediately preceded it. There were no 

 very high winds, the rainfall was on the whole less than the average 

 amount, and in the western half of the kingdom the amount of bright 

 sunshine was in excess of the normal. The temperature was, however, 

 still somewhat low, and there were no very high readings of the thermo- 

 meter obtained. There were several thunderstorms, and in some instances 



