METEOK0L0G1CAL OBSERVATIONS AT WISLEY IN 190o. 175 



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



represented by 100) 74 



Kain fell on 21 days to the total depth of 2-10 ins. 



(Equivalent to rather more than 10 gallons of water per square yard.) 



Heaviest fall on any day 0-64 in. on the 28th 



The prevailing winds were westerly. 



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



There were 187 hours of bright sunshine, equal to 42 per cent, of the total possible 

 amount, and there were no entirely sunless days. 



September. — The weather was frequently unsettled and was generally 

 dull, with a good deal of rain. There were no very warm days, and the 

 month was decidedly cool, frosts occurring on the grass more than once 

 at exposed places. 



The most frequent winds were from westerly points, and as a rule 

 they were moderate in force. Temperature was below the average in 

 nearly every part of the kingdom, and in some instances the deficiency 

 was as much as 3°. The highest temperatures occurred during the first 

 week, but they exceeded 70° in only a few instances. The lowest readings 

 of the thermometer were recorded pretty generally during the third week, 

 and in some districts they were below the freezing point. At Woking- 

 ham (Berks) 29° was reached, but at Wisley 35°. 2 was the lowest point. 

 Rainfall was slight all over the kingdom with a few exceptions. Sun- 

 shine was in excess of the average amount in Scotland, but below it in 

 England and Ireland, the deficiency being most marked in the southern 

 districts, which is very unusual at this season. 



Observations made at Wisley : 



Mean temperature of the air in shade 55°.3 



Highest „ „ „ 72°.3 on the 3rd 



Lowest „ „ „ 35°.2 „ 21st 



Lowest „ on the grass , 29°.8 „ 21st 



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



deep. deep. deep. 



Mean temperature of the soil at 9 a.m 57°.4 58°.9 58°.7 



Highest „ „ „ 62°.0 61°.8 60°.0 



Lowest „ „ „ ... 53°.8 56°.0 56°.6 



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



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



Kain fell on 16 days to the total depth of 2-10 ins. 



(Equivalent to nearly 10 gallons of water per square yard.) 



Heaviest fall on any day * 0'53 in. on the 25th 



The prevailing winds were from south-west and west, and from north and north-east. 

 The average velocity of the wind was 5% miles per hour. 



There were 116 hours of bright sunshine, equal to 31 per cent, of the total possible 



amount. 

 There were 5 sunless days. 



October. — This was a cold, dry, quiet month, with an absence of the 

 rough weather commonly experienced at the season. The first half was 

 dull and sunless, but in most places this was compensated for by the 

 latter half being exceptionally bright and sunny. 



Winds were chiefly from westerly to northerly points, and generally 

 light to moderate in force. Temperature was low all over the kingdom, 

 and in many places the mean was 5° or 6° lower than is usual. The 



