Page:Transactions of the Provincial Medical and Surgical Association, volume 4.djvu/208

 106 probable error in printing three different decimal figures thirty times every month) we must conclude that the fluctuations of the barometer at London and Malvern are very nearly simultaneous and equal, and, if so, of course in all places intervening.

3. Vapour.—All those important meteorological phenomena, rain, cloud, mist, dew, &c. are primarily dependent upon the condition of the vaporous atmosphere which on every side surrounds us, and the health and feelings of individuals are very often materially influenced thereby; it is therefore requisite, in any estimate or comparison of climates, that the changes it is daily undergoing, should be ascertained and recorded. The hygrometer enables us to do this, particularly the one now well known as Daniell's hygrometer

In the Meteorological Tables, published by the Royal Society, there is a column including the dew-point every morning at nine a. m.; and I have made similar observations at the same hour at Malvern. The results are stated in the following table.