Meteorological observations and essays / By John Dalton.

  • John Dalton
Date:
1834
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Licence: Public Domain Mark

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

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    turning to my journal for 1799, I was agreeably surprised to find, on the 12th of November a ‘““N.B. Several large meteors and much lightning in the morning from five to seven o’clock.” The day’s account was, ‘‘ Showery; violent wind P. M.,” and the barometer was near the low extreme. A similar exhibition of meteors was seen over Great Britain, and part of the Continent as far as Geneva, on the morning of the 12th of November, 1832. And what is certainly very remarkable, though probably fortuitous, a like exhibition seems to have taken place in North America, on the morning of the 12th of November, 1833. These meteors, it would seem, are of the same nature as the smaller ones, called falling stars, and the larger ones or fire balls, and probably belong to the same region of the atmosphere, or that re- gion which lies between the clouds and the aurora borealis. Note [C] Sree pace 109. Forty years have elapsed since this Essay on the variation of the Barometer was written ; and I have met with no arguments since, that appear to me more cogent than those which I have used in it to explain the phenomena. Another fact respecting the variation of the barometer indeed appears to be well established, by the attentive and careful ob- servations of that instrument. I mean the diurnal variation first observed in the torrid zone, and EE