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.

    41/280 (page 15)
    GENERAL OBSERVATION. It will be seen from the above accounts, that the barometer is generally highest and lowest about the same time at all the three places; and if the observations had been all taken at the same hour, it would have been more generally the case.—Whenever the barometer happens to be at the monthly extreme at one place, and not at another, I find it is always near it at the other; the greatest differences in this respect seem to take place about the lower extreme, and to be occasioned by rain,—thus, when it happens to be excessively heavy rain at one place, and not at another, the barometer is relatively lowest where the rain falls. Mean state of the barometer at Kendal and Keswick, for the whole 5 years, for each particular month of the year; together with the means upon the extremes of high and low, and the mean monthly range. KENDAL. KESWICK. Mean* | highest] lowest jrange} Mean* | highest] lowest /range January |29.68]/30.45|28.49|1.96]29.62/80.43/28.41/2.02 February |29.77/30.35/28.99|1.36]29.71/30.33/28.91|1.42 March 29.84/30.3 6|29.09/1.27/29.77|30.34/29 .01/1.33 April 29.79)30.23/29.06)1.17]29.72/30.19/28.96]1.23 May 29.88)30.32/29.27)1.05/29.82/30.27/29.13)/1.14 June 29.85/30.26/29.38} .88129.80/80.24/29.30) .94 July 29.74/30.10/29.40) .70}29.68/30.08/29.31] .77 August |29.86/30.28/29.37) .91]29.80/30.27/29.27|1.00 September|29.80/30.26/29.23/1.03]29.74/80.21/29.12/1.09 October |29.76/30.43/28.99|1.44129.69/30.40/28.88]1.52 November|29.78|30.31/28.93)1.38}29.70/30.26/28.85/1.41 December |29.72)30.32/28.97/1.35]29.65|30.25/28.84/1.41 Inches 29.79|30.31/29.20!/1 .2 1129.7 2130.27129.00/1.27 * The means in this column are corrected, on account of the expansion of the mercury by heat; the correction is made by increasing the height in the colder months, and lessening it in the warmer months, proportionally to the defect or excess of temperature, relative to the mean; it never exceeds .03 of an inch.