Meteorological observations and essays / By John Dalton.

  • John Dalton
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Meteorological observations and essays / By John Dalton. Source: Wellcome Collection.

    106/280 (page 80)
    boundary of the atmosphere with precision. To what height the very thin and rare medium in the higher regions rises, we cannot ascertain ; but there is sufficient reason to conclude, as will be seen in a subsequent Essay, that it extends toa much greater height than has commonly been sup- posed. The following table contains the result of a cal- culation from the last mentioned theorem, of the height of the mercurial column, at certain elevations, above the equator, and likewise over the north of England, and the north pole. The mean heat at the earth’s surface, under the equator, is supposed 84°; the mean heat in these parts, for the hottest month of summer, at 60°, and for the coldest month of winter at 35° ; the mean annual tempera- ture at the north pole being supposed 31°, the mean temperature for the coldest month of winter at that place may perhaps be stated at 2°. Height of the mercurial column of the barometer, in inches. 228 208’. Ste dE os: wpee Si NeS Chee TRGE TT) ie oe = 34g | Above the Above the North of Above the Sasa equator. England. north pole. bape aervg In summer. | In winter. | In winter. 0) 30.00 30.00 30.00 30.00 2 20.55 20.10 19.58 18.81 4 13.61 12.96 12.24 L119 6 8.66 Tage 7.26 6.24 8 5.25 4.65 4.03 319 10 3.00 2.52 2.05 1.45 12 sle5 8 1.24 | 93 56