A COMPARISON BETWEEN THE CLIMATES OF 



means of a whole season are taken, and how nearly they all become 

 neutralized in the general average for the year. 



The first column for Malvern, in the following Table, con- 

 tains the summer and autumn of the year 1834, the winter of 1834 

 and 1835 (viz., December, 1834, January and February, 1835), 

 and the spring of 1835 (viz., March, April, and May). The 

 second column contains the summer and autumn of 1835, the winter 

 of 1835 and 1836, and the spring of 1836. These remarks will 

 also apply to the other Tables. 



TABLE I. 



-Mean temperature of the Seasons in Malvern and London, 

 in 1834, 1835, and 1836. 



In the above Table, the cold winter and spring of 1835 — 6, are 

 indicated by the lower mean temperature of these two seasons ; and 

 had it not been for some hot sunny days in May, the mean for the 

 spring of that year would have been still lower. The general 

 opinion, we believe, is, that the winter in Malvern is colder than 

 in other situations ; but the result of two years' careful observation 

 has shewn that this season is as mild in Malvern as in London. 



A thermometer, in the shade ought to be considered as indicating 

 a resultant temperature, not only from the action of the sun's 

 rays upon a variety of surfaces, all radiating heat of greater 

 or less intensity — such as buildings, walls, the surface of the ground, 

 &c. ; but also from condensations of moisture, such as clouds, fogs, 

 &c. The evaporation and exhalation from green and growing sur- 

 faces, and the absence of walls, buildings, pavements, &c, in the 

 country, materially circumscribe the reflection and accumulation of 

 heat, and tend greatly to render the maximum of the thermometer 

 lower on a sunny day than where an arid or barren surface is exposed, 

 as in sandy plains— or where houses are congregated, as in towns. 



In summer, during clear weather, the temperature of the air in 



