Page:Transactions of the Provincial Medical and Surgical Association, volume 4.djvu/213

Contrasting these two winds, north-east and south-west, so opposite in character and direction, we have the following—

Table of mean temperatures and mean dew-points, at London and Malvern.

		Wind.	London.		Malvern.
			Mean temp.	Mn. dew-point	Mean temp.	Mn. dew-point
Spring	$\left\{{\begin{matrix}\\\ \end{matrix}}\right.$	N. E.	18.0	40.0	46.1	37.1
		S. W.	50.4	43.5	50.9	46.3
Summer	$\left\{{\begin{matrix}\\\ \end{matrix}}\right.$	N. E.	64.2	55.4	60.0	53.3
		S. W.	66.8	57.0	62.4	56.0
Autumn	$\left\{{\begin{matrix}\\\ \end{matrix}}\right.$	N. E.	49.4	45.6	47.0	43.2
		S. W.	53.4	50.8	53.6	50.5
Winter	$\left\{{\begin{matrix}\\\ \end{matrix}}\right.$	N. E.	35.6	29.6	35.0	28.7
		S. W.	46.0	42.9	45.6	44.0

An attentive consideration of the above table will shew, that in spring the mean temperature of south-west winds is 5° higher in Malvern than the mean temperature of north-east ones; whereas, in London, the mean difference between them is only about half this, or 2½°. At this season the mean dew-point at Malvern, of south-west winds, is 9° higher than the mean dew-point of north-east ones; whereas, in London, the mean difference is not more than 3½°. North-east winds, in the spring, are

mediately absorbed by the air. The consequence is, that the south west breezes, when they reach our shore, bring with them the character of the locality whence they spring, modified by the colder temperature they meet with. They are mild, and, except in the summer, almost always saturated with vapour. i. e. the temperature of the air and the dew-point are pretty nearly the same.