A COMPARISON BETWEEN THE CLIMATES^ &C, 55 



In February, the last month of the winter quarter, the 

 mean temperature at Malvern was j^ of a degree higher than 

 the mean temperature in London. The mean maximum at 

 Malvern was 48.", the mean minimum, 37-4° ; in London 

 the mean maximum, 47- 7°^ t^e mean minimum, 37.1.° The 

 greatest height of the thermometer during the month, in 

 London was 53.2°, in Malvern, 525°; the minimum in 

 London, 27-9°, in Malvern, 28.5°. The maximum range in 

 the former place, 25.3°, in the latter, 24.° 



For the winter quarter — 



Mean temperature. Mean maximum range. 



London 41.1*' 24.9« 



Malvern 41.3° 25.5*' 



From the foregoing statement we perceive that the generally 

 clouded state of the atmosphere, and the less altitude of the sun 

 during the winter, prevent that accumulation of temperature which 

 occurs in London, during the summer quarter especially, from the 

 copious and varied reflections of heat from the sun's rays acting 

 upon the pavements, buildings, &c. of a large city ; while, doubt- 

 less, the numerous gas-lights, and the columns of heated air issu- 

 ing from a vast accumulation of chimnies during the night, arrest 

 the depression of temperature which would otherwise ensue from 

 radiation. The former circumstance tends to equalise the condition 

 of the two places during the day ; and we find that, for the quarter 

 under consideration, the mean maximum for each month in either 

 place varies but little ; the latter observation would tend to in- 

 crease the mean minimum, and also the absolute minimum for each 

 month — ^i. e. to prevent the depression of the thermometer during 

 the night in London. Nevertheless, we see that, for the winter 

 quarter, the mean temperature of Malvern is as high as the mean 

 temperature of London. 



In March, the first month of the spring quarter, the mean 

 temperature at Malvern was ,o of a degree lower than the 

 mean temperature in London. The mean maximum at 

 Malvern was 47-9°, the mean minimum, 37.° ; in London 

 the mean maximum was 48.3°, the mean minimum, 37 2°. 



