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 ad- 

 vanced 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 undistin- 

 guished 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 mo- 

 tion of the beams was in wreaths, or segments of circles ; rapid, and exhi- 

 biting at the lower 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 Auroras and 

 other observations relative to their height, have been delivered in a separate 

 paper. 



*A 



