Graham's Magazine, Vol. XL, No. 4, April 1852Various
General
Graham's Magazine, Vol. XL, No. 4, April 1852
Various
Literature -- Periodicals; Literature, Modern -- 19th century -- Periodicals
The preceding statement refers to aurora in high northern latitudes,
where the full magnificence of the phenomenon is displayed. It forms a
fine compensation for the long and dreary night to which these regions
are subject, the gay and varying aspect of the heavens contrasting
refreshingly with the repelling and monotonous appearance of the earth.
We have already stated that the direction in which the aurora generally
makes its first appearance, or the quarter in which the arch formed by
this meteor is usually seen, is to the northward. But this does not hold
good of very high latitudes, for by the expeditions which have wintered
in the ice, it was almost always seen to the southward; while by Captain
Beechey, in the Blossom, in Kotzerne Sound, 250 miles to the southward
of the ice, it was always observed in a northern direction. It would
appear, therefore, from this fact, that the margin of the region of
packed ice is most favorable to the production of the meteor. The
reports of the Greenland ships confirm this idea; for, according to
their concurrent testimony, the meteoric display has a more brilliant
aspect to vessels passing near the situation of the compact ice, than to
others entered far within it. Instances, however, are not wanting, of
the aurora appearing to the south of the zenith in comparatively low
latitudes. Lieutenant Chappell, in his voyage to Hudson’s Bay, speaks of
its forming in the zenith, in a shape resembling that of an umbrella,
pouring down streams of light from all parts of its periphery, which
fell vertically over the hemisphere in every direction. As we retire
from the Pole, the phenomenon becomes a rarer occurrence, and is less
perfectly and distinctly developed. In September, 1828, it was observed
in England as a vast arch of silvery light, extending over nearly the
whole of the heavens, transient gleams of light separating from the main
body of the luminosity; but in September, 1827, its hues were red and
brilliant. Dr. Dalton has furnished the following account of an aurora,
as observed by him on the 15th of October, 1792:—“Attention,” he
remarks, “was first excited by a remarkably red appearance of the clouds
to the south, which afforded sufficient light to read by at 8 o’clock in
the evening, though there was no moon nor light in the north. From
half-past nine to ten there was a large, luminous, horizontal arch to
the southward, and several faint concentric arches northward. It was
particularly noticed that all the arches seemed exactly bisected by the
plain of the magnetic meridian. At half-past ten o’clock streamers
appeared, very low in the south-east, running to and fro from west to
east. They increased in number, and began to approach the zenith
apparently with an accelerated velocity, when all on a sudden the whole
hemisphere was covered with them, and exhibited such an appearance as
surpasses all description. The intensity of the light, the prodigious
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