METEOROLOGICAL OBSERVATIONS AT CHISWICK IN 1902. 1073 



REPORT ON THE METEOROLOGICAL OBSERVATIONS MADE 

 IN THE SOCIETY'S GARDENS AT CHISWICK IN 1902. 



By Edward Mawley, Past-President R.Met.Soc. 



There has been no change during the year in the position of any of the 

 instruments, and the records have been taken regularly, as in the three 

 previous years, by the observer, Mr. T. W. Turner, at 9 a.m. each day. 

 After carefully checking the entries in the observation book and com- 

 paring all those which appeared in any way doubtful with similar 

 observations made at three other meteorological stations in and near 

 London, it was found necessary to alter only six of the entries. In eight 

 cases the columns of figures had been incorrectly added up, and in four 

 cases the means had been incorrectly calculated. In November I tested 

 all the thermometers, and found them in good working order and reading 

 correctly. 



A Brief Monthly Summary of the Observations taken in the Society's 

 Gardens at Chiswick in 1902. 



January. — Very warm and very dry. Both the days and nights were, 

 as a rule, about 4 degrees warmer than is seasonable. On the coldest 

 night the thermometer on the grass showed 14 degrees of frost. 



The rainfall was very light, being less than half the average quantity 

 for the month. 



Mean temperature of the air in shade 41°.6 



Highest „ „ „ 53°. 1 on the 10th 



Lowest „ „ „ 22°.2 „ 15th 



Lowest „ on the grass 18°.4 „ 15th 



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

 deep deep. deep. 



Mean temperature of the soil at 9 a.m 41°.l 43°.0 45°.0 



Highest „ „ „ 45°.l 44°.8 45°.7 



Lowest „ „ „ 36°.4 41°.0 44°.0 



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



represented by 100) 85 



Rain fell on 7 days to the total depth of 0*73 in. 



(Equivalent to about 3| gallons on each square yard of surface in the Gardens.) 

 Heaviest fall on any day 0-20 in. on the 1st 



February. — Very cold and very dry. Both the days and nights were, 

 as a rule, about 4 degrees colder than is seasonable. On the coldest 

 night the thermometer on the grass showed 22 degrees of frost. 



The rainfall was very light, being more than half an inch below the 

 average quantity for the month. 



Mean temperature of the air in shade ... ... ... ... 35°.9 



Highest „ „ „ 53 \6 on the 28th 



Lowest „ „ „ 14°.0 „ 16th 



Lowest „ on the grass ... 9°.9 „ 16th 



T 



