62 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



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



represented by 100) 70 % 



Rain fell on 9 days to the total depth of 1*01 in. 



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



Heaviest fall on any day 0-33 in. on the 13th 



The prevailing winds were westerly. 



The average velocity of the wind was 4 miles an hour. 



There were 235 hours of bright sunshine, equal to 63 per cent, of the greatest possible 

 amount. 



There were only 2 days on which no sunshine was recorded. 



October. — By the beginning of October the long spell of fine 

 weather had quite come to an end, and there ensued a month in which 

 the conditions were very nearly normal. Temperature was about the 

 av/erage, the highest reading at Wisley being just over 67° on 

 the 12th ; but as a rule the maxima were below 60°, and it was not 

 until the 29th that a frost was recorded by the screened thermo- 

 meter, although several ground frosts occurred in the first fortnight, 

 and again in the closing week. The first half of the month was dry, 

 but the latter half unsettled, with occasional heavy falls of rain; 

 over the greater part of England the totals were between 2 and 3 

 inches, but in the south-east they ranged from 4 to 6 inches. 

 Bright sunshine was less frequent than of late, but there were only 

 nine days on which none was recorded at Wisley, and the total there 

 was 28 per cent, of the possible amount for the month. 



The results from Wisley are as follows : 



Mean temperature of the air in shade 49°*6 



Highest „ „ „ 67°-4 on the 12th 



Lowest „ „ „ 27°-6 „ 29th 



Lowest „ on the grass 19°-0 „ 29th 



Number of nights of ground frost ... 11 



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



deep. deep. deep. 



Mean temperature of the soil at 9 a.m ... 50°'9 52°-8 55°-6 



Highest „ „ „ 54°-9 56°-6 59°'l 



Lowest „ „ „ 44°-l 48°-5 53°-0 



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



represented by 100) 88 % 



Eain fell on 16 days to the total depth of 2-96 in. 



(Equivalent to about 13| gallons of water to the square yard.) 



Heaviest fall on any day 1*30 in. on the 24th 



The prevailing winds were north-easterly and south-westerly. 

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



There were 91 hours of bright sunshine, equal to 28 per cent, of the greatest 



possible amount. 

 There were 8 days on which no sunshine was recorded. 



November. — This was a boisterous month, due to the passage of 

 frequent cyclonic depressions over our islands or in their immediate 

 neighbourhood. Temperature was nearly normal ; but with the strong 

 southerly winds of the earlier days, and again near the middle of the 

 month, there were some unusually warm days, when the thermometer 

 rose to nearly 60 degrees. There were occasional frosts, but at Wisley 

 the lowest point reached was only 27° in the screen and 18° upon the 



