REPORT ON METEOROLOGICAL OBSERVATIONS AT WISLEY. 55 



of February, the barometer rising to upwards of 30-8 inches, with 

 light northerly winds and occasionally very low temperatures, 19° 

 being recorded at Wisley in the screen and 12° by the thermometer 

 exposed upon the grass. But before the middle of the month a 

 change had set in, and the w^eather became affected by a series of 



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Fig. 25. — Mean Temperature of the Air ; Mean Maximum and Mean Minimum 

 Temperature of the Air : Mean Temperature on the Grass, for each Month. 



atmospheric disturbances which skirted our north-western coasts, bring- 

 ing very heavy rains to those regions, although all the eastern dis- 

 tricts and central and southern England continued dry, and causing 

 also a general rise of temperature. The weather generally had thus 

 become unsettled and mild, and in spite of the cold at the beginning 

 the mean temperature for the month was well above the average. 



