METEOROLOGICAL OBSERVATIONS AT WISLEY IN 190,5. 171 





At 1 ft. 



At 2 ft. At 4 ft. 





deep. 



deep. deep. 



Mean temperature of the soil at 9 a.m. 



40°.8 



41°.8 42°.<; 



Highest ,, ,, 



44°.C 



43°.8 43°.8 



Lowest „ ,, ,, 



37°.8 



38°.8 40°.G 



Mean relative humidity of the air at 9 



a.m. (complete saturation being 



represented by 100) 





86 



Rain fell on 14 days to a total depth of ... 





0 54 in. 



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



Heaviest fall on any day 0T8 in. on the 26th 



The prevailing winds were westerly. 



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



There were 82 hours of bright sunshine, equal to 30 per cent, of the total possible 

 amount, and there were but 4 entirely sunless days. 



March. — The weather was very varied in character during the month, 

 but generally it was warm, rough, and boisterous ; the strong winds and 

 gales being accompanied by a good deal of rain, hail, or sleet, and by 

 more thunderstorms than usually occur in March. 



The wind was chiefly from west or south-west, although in Scotland 

 it blew a good deal from south and south-east ; its force was frequently 

 strong, and occasionally it reached that of a severe gale. The tempera- 

 ture was generally high, in some districts as much as 3° above the 

 average, and its range was considerable. The warmest period was 

 usually near the 20th, and the coldest during the opening days of the 

 month. Eainfall was mostly in excess of the average, and in some 

 parts of the kingdom considerably so, the fall being spread fairly 

 uniformly over the month. Sunshine also was generally in excess of 

 the average, although the month was a wet one, but some districts in the 

 north and others in the south proved exceptions to this general rule. 



Observations made at Wisley : 



Mean temperature of the air in shade 45°.0 



Highest „ „ „ 60°.9 on the 22nd 



Lowest „ „ „ 26°.9 „ 4th 



Lowest ,, on the grass 17°. 1 „ 4th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 43°.4 44°.0 43°.9 



Highest „ „ „ 46°.9 46°.9 45°.9 



Lowest „ „ „ 37°.9 40°.5 42°.3 



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



represented by 100) ... ... ... ... ... ... ... ... 84 



Rain fell on 22 days to the total depth of ... ... ... ... 3*62 ins. 



(Equivalent to nearly 17 gallons of water per square yard.) 

 Heaviest fall on any day ... ... ... ... ... ... 0*63 in. on the 15th 



The prevailing winds were south-westerly. 



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



There were 127 hours of bright sunshine, equal to 35 per cent, of the total possible 

 amount, and there were only 4 sunless days. 



April. — This was a month of characteristically changeable and un- 

 settled weather, and it was also exceptionally dull and cold. Three or 

 four thunderstorms were experienced, and early on the morning of the 

 23rd — Easter Day — slight shocks of earthquake were felt over the northern 

 half of England. 



The winds were distributed fairly uniformly round the compass, with 



