MKTEOKOLOGICAL OBSERVATIONS AT WISLEY IN 1901. 047 



Mean temperature of the air in shade 40°.5 



Highest „ „ » 59°.3onthe 8th 



Lowest „ „ „ 25°.0 „ 12th 



Lowest „ on the grass 21°. 5 „ 17th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 39°.6 41°.0 41°.9 



Highest „ „ M 45°.2 43°.9 43°.2 



Lowest „ „ „ 34°.8 37 c .4 40°.5 



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



represented by 100) ... ... ... ... ... ... ... ••• 86 



Rain fell on 17 days to the total depth of 1'54 ins. 



(Equivalent to about 7 gallons of water per square yard.) 



Heaviest fall on any day 0*30 in. on the 31st 



The prevailing winds were northerly. 



The average velocity of the wind was 7 miles per hour. 



There were 82 hours of bright sunshine, equal to 22 per cent, of the total possible 

 amount. 



April. — A mild month with a predominance of westerly winds, a 

 moderate rainfall, and a fair amount of sunshine. 



Mean temperature of the air in shade 





49°.2 



Highest „ „. „ 





66°.4 



Lowest ,, ,, 





32°.2 



Lowest „ on the grass 





24°.9 





At l ft. 



At 2 ft. 





deep. 



deep. 



Mean temperature of the soil at 9 a.m 



47°.l 



47°.2 



Highest „ „ ,, 



51°.0 



49°.3 



Lowest ,, „ ... 



41°.8 



43°.3 



At 4 ft. 

 deep. 



45°.9 



47°.9 



43°.3 



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



represented by 100) ... ... ... ... ... ... ... ... 79 



Rain fell on 14 days to the total depth of 1-20 in. 



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



Heaviest fall on any day 0*28 in. on the 22nd 



The prevailing winds were from south-west to north-west. 

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



There were 156 hours of bright sunshine, equal to 38 per cent of the total possible 

 amount. 



There was only one day on which no sunshine was recorded. 



May. — A somewhat dull month with more than the average rainfall, 

 less sunshine than is usual in May, which is generally the brightest month 

 of the year, variable winds, and on the whole temperature rather above the 

 average, although with one or two somewhat cold spells. 



Mean temperature of the air in shade ... ... ... ... 53°.6 



Highest „ „ „ 73°.5 on the 16th 



Lowest ,, „ „ 34°.2 „ 9th 



Lowest „ on the grass 26°.2 „ 9th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m. ... ... ... 53°. 5 53°.0 50°.4 



Highest „ „ „ 59°.7 60°.0 53°.o 



Lowest „ „ „ 47°.9 49°.4 48°.l 



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



represented by 100) 77 



Rain fell on 16 days to the total depth of 2-43 ins. 



(Equivalent to about 11| gallons of water per square yard.) 

 Heaviest fall on any day ... ... ... ... ... ... 0'71 in. on the 20th 



