GREAT MALVERN AND LONDON. 29 



celerated by the slightest current, and enormously increased by a 

 brisk or high wind. 



In calm weather, if there is no interval between the dew point 

 and the temperature of the air, there is no evaporation ; if the lat- 

 ter rises evaporation commences, but if it falls precipitation begins. 

 If when the dew point and the temperature of the air are the same 

 the wind blows strong, there is then some degree of evaporation, 

 and the air appears to carry with it particles of nascent vapour, 

 something in the same way that it blows up the dust in our roads, 

 the particles of vapour remaining visible, and rendering the air 

 misty or, as it is termed, thick and hazy. 



TABLE V — The number of days on which Rain or Snow fell during each 

 Season in 1834, 1835, and 1836. 



Summer 

 Autumn 

 Winter 

 Spring 



i a 



In taking notice of rain and rainy days with reference to season 

 and climate, the length of time during which it is falling is quite 

 as worthy of regard as the quantity. As much rain may fall dur- 

 ing a heavy shower in an hour or two as in a whole day's mizzling 

 rain ; and yet the former may be a fine, sunny, and beautiful day ; 

 the latter, a wet and miserable one. 



The temperature of rain as it descends is, doubtless, very various ; 

 it is generally of the same temperature as the dew point. What- 

 ever the temperature of rain may be when it descends for an hour 

 or two, the air and constituent temperature of the vapour will be 

 equalized. 



The following remarks, taken from the meteorological journal to 

 which we are indebted for the preceding tables and observations, 

 may not be unacceptable to our readers. 



Jan. 23rd, 1 8-34. Notwithstanding the extreme mildness 

 of this winter, and the great quantities of rain which have 

 fallen during the last thirty days, it has not been by any 

 means sickly — all accounts seem agreed in this particular — 

 though coughs, colds, and rheumatic attacks of a minor cha- 

 racter, were observed in the early part of the autumn of 



