138 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



contrast to the preceding month, when there was a record amount of 

 sunshine, the amount now recorded was exceptionally small, averaging 

 less than four hcurs a day at Wisley, and still less in some other 

 parts of the kingc^'om, and generally reaching less than a quarter of the 

 possible amount. The winds were from northerly points as a rule, but 

 generally speaking they were not strong. 



The following are the results of the observations made at Wisley : 



Mean temperature of the air in shade ... 54°.2 



Highest „ „ „ 71°.0 on the 19th 



Lowest „ „ „ 87°.0 „ 11th 



Lowest „ on the grass 34°.0 „ 11th 



At 1 it. At 2 ft. At 4 ft 

 deep. dcpp. doop. 



Mean temperature of the soil at 9 A.M 5G°.6 56 '.8 54°.3 



Highest „ „ „ 60^2 58^8 55°.7 



Lowest „ „ „ 52°.7 54°.l 53°.l 



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



represented by 100) 73 % 



Rain fell on 21 days to the total depth of ... ... ... ... ... 3*80 in. 



(Equivalent to about 17f gallons of water to the square yard.) 



Heaviest fall on any day 0-G5 in. on the 26th 



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

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



There were 116 hours of bright sunshine, equal to 24 per cent, of the greatest 



possible amount. 

 There were 6 days on which no sunshine was recorded. 



July. — The month, like the preceding one, was dull, wet, and cold, 

 and although the weather was somewhat better than that of June, yet 

 even over the Southern Counties, where the improvement was greatest, 

 it was, after all, not very great. Quite at the commencement of the 

 month there occurred some unusually low night temperatures, the ther- 

 mometer on the grass at Wisley falling to 36°, and in a few places it 

 fell to the freezing-point. Generally speaking, however, the deficiency 

 in the mean temperature was due to the remarkably low day readings 

 rather than to the night minima, which were, as a rule, fairly normal, 

 and so the daily range of temperature was by no means large. The 

 latter part of the month was extremely unsettled, and the closing days 

 were very wet. As regards sunshine, the record for the month showed 

 a decided improvement upon that of June, especially over the southern 

 part of England, but the total amount, although it reached 40 per 

 cent, of the possible total, was still 28 per cent, less than the percentage 

 recorded in May. The winds were almost entirely westerly. 



The following are the results of the observations made at Wisley : 



Mean temperature of the air in shade ... ... 60°.4 



Highest „ „ „ 75°.0 on the 18th 



Lowest „ „ „ 42°.0 „ 1st 



Lowest ,, on the grass ... ... ... ... ... 36°.3 ,, 1st 



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



deep. deep. deep. 



Mean temperature of the soil at 9 a.m. 60°.4 60°.0 57°.2 



Highest „ „ „ 64°.0 62°.3 58°.7 



Lowest „ „ „ 56°.4 67°.2 o5°,§ 



