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.

    205/280 (page 179)
    The small number in June and July is undoubt- edly owing in great part to the twilight ; but the deficiency in December, January, and February, cannot be owing to the same cause. Upon the whole, I think it is not improbable that the agitations caused by the moon in the very high regions of the atmosphere, which we may suppose are not much agitated by the tempests in the lower regions, may have some effect upon the phenomenon in question; and the supposition is evidently countenanced by the several facts stated above. SECTION SIXTH. An investigation of the effect of the Aurora Borealis on the Weather succeeding it. Various have been the conjectures on this sub- ject offered to the consideration of the public: some assert that the aurora has no sensible effect upon the weather ; others that it is very frequently followed by rain soon after. In the American Philosophical Transactions, we find it observed that the barometer fad/s after an aurora. Having a large number of observations on the