Page:Transactions of the Provincial Medical and Surgical Association, volume 4.djvu/218

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We must, therefore, rest content with the testimony of those who have experienced the great and often rapid improvement of health which occurs from a residence in Malvern.

That its well established salubrity does not altogether depend upon any of those meteorological phenomena embraced in the foregoing tables, must be sufficiently obvious, when the difference found, on a comparison of the results at London and Malvern, is so small.

The oscillations of the barometer, we have seen, hardly vary at all. The greatest difference in the maximum of the thermometer, at the two places, never amounted to more than 10°; and in the minimum to more than 6°. The weight and elasticity of the vapour of the atmosphere, likewise do not differ much; the greatest variation in the maximum dew-point was 7°, and in the minimum 11°.

Now, in the same place, the variations in the maximum of the thermometer, and in the dew-point, are sometimes much greater in a comparison of two successive days, amounting to from 10, 15, or even as much as 90 degrees in the former; and 10, 15, or 17 degrees in the latter; so that throughout the year there is not so great a difference, at any period, between the temperature either of the air or vapour at London and Malvern, as there is, sometimes, at either place between one day and another.

The variations in the other phenomena usually embraced in meteorological registers, wind, rain, &c. do not furnish materials sufficient, in any degree, to account for differences in the salubrity of these or other places.