*
[footnote] *Argelander, in the important observations on the northern light
embodied in the 'Vortr??gen gehalten in der physikalish-okonomischen
Gessellschaft zu Konigsberg', bd. i., 1834, s. 257-264.
The highest point of the arch of light is, according to accurate
observations made on the subject,* not generally in the magnetic meridian
itself, but from 5 degrees to 18 degrees toward the direction of the
magnetic declination of the place.**
[footnote] *For an account of the results of the observations of Lottin,
Bravais, and Siljerstrom, who spent a winter at Bosekop, on the coast of
Lapland (70 degrees N. lat.), and in 210 nights saw the northern lights 160
times, see the 'Comptes Rendus de l'Acad. des Sciences', t. x., p. 289, and
Martins's 'Meteorologie', 1843, p. 453. See also, Argelander in the
'Vortragen geh. in der Konigsberg Gessellschaft', bd. i., s. 259.
[footnote] **[Professor Challis of Cambridge, states that in the Aurora of
October 24th, 1847, the streamers all converged toward a single point of the
heavens, situated in or very near a vertical circle passing through the
magnetic pole. Around this point a corona was formed, the rays of which
diverged in all directions from the center, leaving a space free from light:
its azimuth was 18 degrees 41' from south to east, and its altitude 69
degrees 54'.
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