• December 9th, at eleven p.m., an arched Aurora; centre north; colour light
yellow, very bright.
12th. At eight p.m., an arched Aurora, centre north; colour light yellow;
faint.
January 14th, 1820, at ten p.m. Aurora faintly visible, north.
19th. An Aurora, embracing the horizon, from N.N.W. to N.N.E., about
■ 12° high, 5° broad; faint, but permanent; twelve p.m.
20th. At eleven p.m., an arched Aurora, centre north, 15° high, and 5°
broad.
27th. At ten p. m., an Aurora, 40° high, and 5° broad; usual colour, and
faint; - centre north.
February 2d, an Aurora, very faint; centre north, about 2° high, extending
from east to wést.
8th. Appearance of an Aurora, at ten p.m., in the northern horizon.
10th. An Aurora arched; centre N. b. E., about 4° high, and 30° long.
12th. -At ten p.m., an arched Aurora; centre north, about 6° high. Between
it and the zenith were sometimes visible several perpendicular streams,
with one extremity pointed, and declining nearly in the direction of the dipping
needle. They sometimes re-appeared in the same place which they had
occupied at first. I shall, for the future,5•• call them flashes.
19th. An Aurora across the zenith, cutting the meridian at right angles.
That side of it which faced the south was a regular line; but the other
streamed at intervals towards the east or west, separating itself into portions
resembling the flashes, but much smaller; colour as usual; many flashes near
the northern horizon. This Aurora was followed, on the 20th, by a storm of
snow E.S.E.
29th. An Aurora arched, centre north; extending . 60°, height 30“,
breadth 5°. Towards the eastern extremity, it was broken by a quick undulating
motion, into those portions described above, which I shall call beams;
because they appear to tend towards a common centre, though their direction
is sometimes altered when in motion; colour as usual.
March 4th, at twelve p.m., a beautiful and singular Aurora; four regular
concentric arches, the outermost extending from N.N.W. toE.N.E., about 30°
high, and the others at equal distances within it, the last being 7° high. Each
was 3° broad; faint, but visible for three hours.
No. II.] AURORA BOREALIS. 545
March 5th. An appearance of Aurora in the northern horizon.
6th. A large, brilliant, arched Aurora, centre N.N.E., at nine p.m. It advanced
rapidly to the southward, separating into beams, and scattering many
flashes. The motion of the beams' was exceedingly quick, and they were
bright, but of the usual colour! They ranged themselves in wreaths, forming
coronae boreales in the zenith, which.faded gradually,-leaving a pale undistinguished
body of light, out of which they were soon again renovated, without
apparent communication with any. other body of the Aurora.
7th. At one a. m., the above Aurora spread over the whole sky, except a
portion from S.S.E. to.S,S.W.
At nine p.m., an arched Aurora,: centre-N.N.E; many-flashes, which at
twelve p.m. filled the northern half of the sky.
8th. an arched Aurora, centre N.N.E. It did not;advance to the zenith,
but separated into brilliant beams, and scattered many flashes. The motion
of the beams was in wreaths, or segments Of circles ; rapid, and exhibiting
at theffower extremities. a red-orange colour, and at the upper, faint
yellow.
9th. At eight p.m., an Aurora, consisting of several arches* the highest of
Which was the faintest. They were almost obscured by flashes between
them and the spectator.
10th. At nine p.m., an Aurora, in rapid motion, seen through breaks in
the clouds.
11th. An Aurora, in many segments,.from E.N.E. to W.N.W.; beams in
rapid motion, ordinary colour.
:12th. At eight p. m., an;arched Aurora, centre N.b.E. At ten p.m. it
approached near the zenith, and broke into beams and flashes, ordinary
■ colour.
14th and 15th. Aurorae just visible through the clouds.
16th. A bright Aurora, but almost hid by the clouds.
17th. Aurora visible through a dense haze.
18th. At twelve p. m., an arched Aurora, centre N.N.E., about 20° high,
6° broad, extending from N.W, to east.
19th. At eight p. m., an appearance of Aurora in the northern horizon.
N. B. From March 22 to April the.8th, the descriptions of the- Aurorae and
other observations relative to their height, have been delivered-in a separate
PaP6r' 9 4 A