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.

    46/280 (page 20)
    mean temperature of Keswick too high when compared with that of Kendal, which ought to be noticed in the comparison. The situation of the thermometers too, is another particular that should be adverted to ;—that at Kendal was without, in a garden, under the shade of a pretty large gooseberry tree, facing the north: the garden is open to the country in the north, and has houses at the distance of 8 or 10 yards to the south. The thermometer at Keswick is situate near, but not in contact with, the wall and window of a house facing the north, which is open to the country: it is about 6 yards above the ground; the sun never shines on it in winter, and only a few weeks in summer, and that early in the morning, long before the observation is taken. From these accounts it is obvious to infer, that the ther- mometer at Keswick will not be liable to the extremes of heat and cold, owing to the influence of the adjoining wall; whereas that at Kendal is perhaps liable to too great an extreme of heat, occasionally, owing to the reflection from the ground, though the sun never shines upon the frame for an hour at least before any observation is taken. The following tables, it is presumed, will be sufficiently ex- plicit; we have given a table each year, containing the days on which the extremes of heat and cold happened at each place, as with the barometer.