METEOROLOGICAL OBSERVATIONS AT CHISWICK EN 1902. 1075 



Mean temperature of the air in shade 49°. 1 



Highest „ „ „ 70°.0 on the 27th 



Lowest „ „ „ 30°.0 „ 14th 



Lowest „ on the grass 22°.6 „ 14th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 50°.8 50°.2 49°.0 



Highest „ „ „ 58°.9 5o°.3 51°.3 



Lowest „ „ „ 47°.3 48°.4 48°.4 



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



represented by 100) 70 



Rain fell on as many as 23 days to the total depth of 2.35 in. 



(Equivalent to about 11 gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day 0*45 in. on the 17th 



June. — Seasonable in temperature and most exceptionally wet. The 

 days were, as a rule, about 1 degree colder, and the nights about 1 degree 

 warmer, than is seasonable. On the coldest night the thermometer on 

 the grass showed 2 degrees of frost. 



The rainfall was most exceptionally heavy, being more than double the 

 average quantity for the month. 



Mean temperature of the air in shade ... ... ... ... 58°. 6 



Highest „ „ „ 61°.0 on the 29th 



Lowest „ „ „ 38°.2 „ 10th 



Lowest „ on the grass 29°.6 „ 10th 



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

 deep. deep. deep. 



Mean temperature of the soil at 9 a.m 58°.9 56°.8 53°.5 



Highest „ „ „ 64°.3 60°.4 55°.7 



Lowest „ „ „ 54°.5 54°.6 51°.5 



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



represented by 100) 69 



Rain fell on 18 days to the total depth of 4-07 in. 



(Equivalent to about 19 gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day ... ... ... ... ... ... 1*00 in. on the 13th 



July. — Cold and very dry. The days were, as a rule, about 1 degree 

 colder, and the nights about 2 degrees colder, than is seasonable. On the 

 coldest night the thermometer on the grass fell to 34 degrees, or 2 degrees 

 short of the freezing-point. 



The rainfall was very light, being about three-quarters of an inch 

 below the average quantity for the month. 



Mean temperature of the air in shade 





61°.2 





Highest „ „ „ 





84°.6 on the 14th 



Lowest „ „ ,, 





41°.8 



„ 12th 



Lowest „ on the grass 





34°.o 



3rd 





At 1 ft. 



At 2 ft. 



At 4 ft. 





deep. 



deep. 



deep. 



Mean temperature of the soil at 9 a.m. ... 



61°.5 



60°.2 



57°.0 



Highest „ „ ,, 



65°.l 



61°.8 



57°.5 



Lowest ,, ,, ,, 



57°.9 



58°.5 



55°.9 



Mean relative humidity of the air at 9 a.m. 



(complete saturation 



being repre- 





sented by 100) 





67 



Rain fell on 10 days to the total depth of 1-58 in. 



(Equivalent to about 1\ gallons on each square yard of surface in the Gardens.) 



Heaviest fall on any day 0'52 in. on the 10th 



t 2 



