174 JOURNAL OF THE EOYAL HORTICULTURAL SOCIETY. 



kingdom, and on several occasions the thermometer rose to over 80°, the 

 range of the mercury approximating to 40° over many inland districts. 

 Eainfall was again less than the average. Over the whole of the southern 

 half of England it amounted to less than an inch, and in several districts 

 to less than a quarter of an inch. At Barnet, however, the exceptionally 

 heavy fall of 2*4 inches occurred in the thunderstorm referred to above. 

 Sunshine was much more than the average in amount over the greater 

 part of the country, but there was again a deficiency over south-west 

 England and southern Ireland. 

 Observations made at Wisley : 



Mean temperature of the air in shade ... ... ... ... 65° A 



Highest „ „ „ 82°.6 on the 26th 



Lowest „ „ „ .'. ... 44°.4 „ 7th 



Lowest „ on the grass 38°.6 „ 19th 



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

 deep. deep. deep. 



Mean temperature of "the soil at 9 a.m 66°.2 64°.9 61°.0 



Highest „ 68°.9 66°.7 62°.7 



Lowest „ „ „ 63°.0 61°.7 58°.6 



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



represented by 100) 70 



Rain fell on 6 days to the total depth of 0*54 in. 



(Equivalent to about 2| gallons of water per square yard.) 

 Heaviest fall on any day ... ... ... ... ... ... 0*20 in. on the 22nd 



The prevailing winds were south-westerly and westerly. 

 The average velocity of the wind was 4§ miles per hour. 



There were 248 hours of bright sunshine, equal to 50 per cent, of the total possible 

 amount ; and on no day was less than 2^ hours of sunshine recorded. 



August. — This was another month of unsettled weather. Thunder- 

 storms were frequent and in several instances severe, and generally the 

 month was cool, wet, and dull. 



The winds blew from all quarters, but chiefly from between west 

 and south, and in some instances they attained considerable strength. 

 Temperature was below the average nearly everywhere, although as a 

 rule the deficiency did not exceed 2°. There were no exceptionally high 

 readings of the thermometer, and the range of the mercury was not large. 

 Eainfall was generally in excess of the average, and in several instances 

 largely so. Over the south-east of England the total fall did not amount 

 to 2 inches, but in other districts it exceeded 5 inches, and in the neigh- 

 bourhood of Dublin it was 8*6 inches. This was chiefly due to an 

 extremely heavy fall of upwards of 4 inches on the 25th, which resulted 

 in a disastrous flood in parts of Co. Wicklow. Sunshine was deficient in 

 most parts of the kingdom. 



Observations made at Wisley : 



Mean temperature of the air in shade 





60°.2 





Highest ,, „ „ 





75°.4on the 14th 



Lowest ,, ,, 





43°.7 



„ 17th 



Lowest „ on the grass 





35°.l 



„ 2nd 





At 1 ft. 



At 2 ft. 



At 4 ft. 





deep. 



deep. 



deep. 



Mean temperature of the soil at 9 a.m 



62°.6 



63°.3 



61°.6 



Highest „ „ ... 



65°.4 



65°.6 



62°.8 



Lowest ,, ,, ,, ... 



58°.5 



60°.4 



60^.3 



