EEPORT ON METEOROLOGiCAL OBSERVATIONS AT WISLEY. 14S 



Rain fell on 12 days, to the total depth of 0*58 in. 



(Equivalent to nearly *2f gallons of water to the square yard.) 



Heaviest fall on any day 0-26 in. on the 29th 



The prevailing winds were south-westerly. 



The average velocity of the wind was 4-7 miles an hour. 



There were 77-| hours of bright sunshine, equal to 29 per cent, of the greatest possible 

 amount. 



There were 9 days on which no sunshine was recordedi 



December. — The weather of December was very variable and un- 

 settled, with frequent strong winds and gales, and a good deal of rain 

 and — towards the close of the month — snow. Temperature also 

 varied .considerably, ranging at Wisley in twenty-four hours from a 

 maximum of 54"^ to a mininuun of 22°, and some sharp night frosts 

 occurred. Over the Northern parts of the kingdom the mean tem- 

 perature was below the average, but over the Southern and Western 

 Couniies the mean did not differ much from the normal. There were 

 many days in succession on which no bright sunshine was recorded ; 

 but on the other hand there were a few bright intervals, and the total 

 amount of sunshine registered, although not large, was yet not very 

 much below the average, indeed in some districts the average was 

 slightly exceeded. 



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



Mean temperature of the air in shade ... ... ... ... 40°.2 



Highest „ „ „ 51°.0 onthe22nd 



Lowest „ „ „ 22°.0 „ 21st 



Lowest „ on the grass 16°.0 „ 21st 



Number of days of ground frost 19 



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



deep. deep. deep. 



Mean temperature of the soil at 9 A.M. ... ... ... 39°.6 41°.9 43°.9 



Highest „ „ „ 44°.6 43°.9 45°.4 



Lowest „ „ „ 31°.8 39".! 42°.6 



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



represented by 100) 91 % 



Rain fell on 20 days to the total depth of 3-00 in. 



(Equivalent to about 14 gallons of water to the square yard.) 



Heaviest fall on any day 0*54 in. on the 17th 



The prevailing winds were south-westerly. 



The average velocity of the wind was 8 miles an hour. 



There were 58 hours of bright sunshine, equal to 24 per cent, of the greatest possible 

 amount. 



There were 14 days on which no sunshine was recorded. 



