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.

    80/280 (page 54)
    ~ have characterized the aurora, by one or more words; stl, denotes the northern horizontal arch; and active, denotes those appearances when distinct flashes and coruscations were seen : but this distinction was not always attended to, and if it had, the aurora often exhibits both appearances at the same time; grand, denotes a large display of streamers over great’ part of the hemisphere ; high, denotes near the zenith, and Jow, near the horizon, apparently. N.B. The dates of those observations not characterized, I re- ceived from a friend; they may be depended on as authentic. A List of the Aurore Boreales observed at Kendal and Keswick, for seven years, namely from May, 1786, to May, 1793; together with the moon's age at the respective times of observation. N.B. For distinction’s sake we have marked all those that were observed at both places with 2, and those observed at Keswick only, with 1; the rest were observed at Kendal only.— Those marked p, were doubtful observations, from twilight, or other causes. al S ald = a: | a, | Ste & | g Character. 5 | 4 Character. S| ERA 1786. |---| 1786. |—|-|—__--_—_ May 1 3 29/14 Yee es) 4 22) |24| 9 a July 15) (20) 4 21] 6 Aug.11| |17) 2 3 17| {23} 8 23] 8 Sep. 8) {16) 1 5| active, low. 19) j27\12 Number 16.