52 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



the marked predominance of the south-westerly wind current, and also 

 the fact that it was exactly the opposite quarter that yielded the next 

 largest number of observations of wind. 



In fig. 23 the mean temperature of the air is compared with the 



Fig. 22. — Differences of the monthly means of Temferatitre and Eainfall 



FROM the Average. 



mean temperature of the soil. The close agreement between the mean 

 warmth of the air and of the soil at the depth of one foot is remarkable ; 

 the change of temperature at the lower depth is slower, and until 

 August was passed it was cooler there than at the depth of one foot, 

 but the more rapid cooling of the shallower layer brought its tempera- 



