METEOROLOGICAL OBSERVATIONS AT CHISWICK IN 1902. 1077 



At lft. At 2 ft,. At 4 ft. 

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 51°.4 53°.l 54°.3 



Highest " „ n » 54°.3 55°.3 56°.0 



Lowest „ „ „ 48°.0 51°.3 52°.8 



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

 sented by 100) 84 



Rain fell on 18 days to the total depth of 1*51 in. 



(Equivalent to about 7 gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day 0*36 in. on the 9th 



November. — Warm and dry. The days were, as a rule, about 1 

 degree warmer, and the nights about 2 degrees warmer, than is season- 

 able. On the coldest night the thermometer on the grass showed 9 

 degrees of frost. 



The rainfall was light, being about a quarter of an inch below the 

 average quantity for the month. 



Mean temperature of the air in shade ... ... ... ... 45°.2 



Highest „ „ „ ... 58°.7 on the 1st 



Lowest „ „ „ 29°.0 „ 21st 



Lowest „ on the grass 23°. 1 on the 13th and 17th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 45°.4 48°.2 50°.7 



Highest „ „ „ 50°.6 51°.0 52°.7 



Lowest „ „ „ 39°.2 44°.4 48°.5 



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



represented by 100) 87 



Rain fell on 15 days to the total depth of 1*82 in. 



(Equivalent to about 8f gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day 0*32 in. on the 28th 



December. — Very warm and rather dry. The days were, as a rule, 

 about 2 degrees warmer, and the nights about 4 degrees warmer, than is 

 seasonable. On the coldest night the thermometer on the grass showed 

 17 degrees of frost. 



The rainfall was rather light, being only about a tenth of an inch 

 below the average quantity for the month. 



Mean temperature of the air in shade 41°.5 



Highest „ „ „ 57°.2 on the 17th 



Lowest „ „ „ 25°.l „ 5th 



Lowest „ on the grass 15°.3 ,, 5th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 42°.0 44°.5 47°.0 



Highest „ „ „ 46°.2 47°.0 48°.7 



Lowest „ „ „ 36°.7 41°.5 46°.0 



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



represented by 100) ... ... ... ... ... ... ... ... 85 



Rain fell on 11 days to the total depth of 1*40 in. 



(Equivalent to about 6^ gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day 0*50 in. on the 17th 



The Diagrams. — The averages with which the different mean monthly 

 temperatures are compared in diagrams 1 and 2 are derived from the 

 observations taken at Kew Observatory during the twenty-five years 



