544 



APPENDIX. 



[No. II. 



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 west. 



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, 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 por- 

 tions 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 undulat- 

 ing motion, into those portions described above, which I shall call beams ; be- 

 cause 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. to E.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. 



