VOL. XVIII. (2) CLIMATE & TOPOGRAPHY, CHELTENHAM 139 



The Barometric Pressure. — So far as barometric pres- 

 sure is concerned, the day-to-day observations serve rather as 

 local indications of temporary change in the weather than as 

 a contrast in climate between two or more places at the same 

 season of the year. The actual mean pressure of every month 

 of the year upon an average of years shows no more jdifference 

 than is observed for the several whole years in the table above, 

 as will be seen from the following : — 



AVERAGE MONTHLY MEAN PRESSURE AT CHELTENHAM 

 FOR 7 YEARS— 1892-1897. 



The range of pressure of the months, however, that is, 

 the difference between the highest and lowest pressure 

 registered, taken through a number of years, is found to be 

 greater in the six months on the Winter side of the year than 

 in the six months on the Summer side : — 



AVERAGE RANGE OF PRESSURE IN THE 12 MONTHS AT 

 CHELTENHAM FOR TEN YEARS— 1892-1901. 



IN INCHES. 



January February March April May June 



1-361 1-424 1-359 -987 -974 -876 



July August September October November December 



-774 -828 1-006 1-304 1-456 1-362 



The Maximum and Minimum Temperatures. — As to 

 teinperature, the figures of the table may be further supple- 

 mented. 



The mean monthly maximum and minimum temperatures 

 show a very gradual rise and fall from Winter to Summer and 

 from Summer back to Winter, and prove the temperate 

 character of the climate in the matter of heat and cold. 



Monthly normals of Maximum and Minimum Tempera- 

 tures derived from record of 21 years (1892-1912), being the 

 average of the monthly means for those years. 



January February March 



Maximum . . 43-6 45-1 49-6 



Minimum . . 33-6 34-1 35-4 



April May June 



Maximum . . 60-3 61*9 67-4 



Minimum . . 38-4 43-7 49-4 

 E 



