54.6 



APPENDIX. 



[No. II. 



April 10th and 12th. Appearance of Aurora north. 



14th. At 9 p, m., an arched Aurora, about 15° high, centre north. 



15th. An arched Aurora, 16° high, centre N.b.E. 



16th. Appearance of Aurora, N.N. E. 



19th. At 10 p. m., an arched Aurora 25° high; centre N. b. E., extend- 

 ing from N.E. to N.N.W. At 11 p. m. it was 35° high, and its eastern 

 extremity turned back upon itself, and appeared to dart a flash perpendicu- 

 larly towards the earth. At llh. 30' p. m. several flashes reached the zenith, 



colour as usual. 



20th. Appearance of Aurora through a thick fog. 



27th. At 12 p. m., a segment of an arch, and several flashes, north; and 



about 30° high. 



29th. Several flashes of Aurora, bearing north. 



30th. 1 At 8 p. m. an arched Aurora 30° high; centre bearing N.N.E. ex- 



tremes N.E. b. E. and N.W. b. N. 



May 1 st. At 1 2 p. m., a remarkable Aurora rose from E.N.E. like the trunk of 

 a tree, and spread forth branches all over the sky, but principally towards the 

 South. They were composed of beams which always are distinguishable 

 when the Aurora is much agitated; ordinary colour; many scattered flashes 



round the horizon. 



2d. At 11 p. m., an arch across the zenith; 6° broad, and faint ; ex- 

 tremes E.b. S. and W.b.N. 



3d. At 10 p. m., an Aurora in rapid motion, seen through the clouds. 



5th. At 11 p. m. an arched Aurora, very faint ; centre N.N.E. 



12th. At 12 p. m., the northern half of the sky was filled with a light 

 attenuated Aurora, not more brilliant than the milky way ; but flashing with 

 such rapidity, that the eye could not follow its motion, nor determine its form. 

 • 12th. At 8 p. m., appearance of Aurora, north. 



18th, Ditto. 



23rd. An arched Aurora, 1 5° high ; centre N. b. E. 



28th. Appearance of Aurora in the northern horizon. 



N.B. The above descriptions were taken at the times inserted ; the Aurora 

 no doubt often changed its form afterwards. Many of the faint arches, however, 

 altered only their positions in the course of four or five hours, by approaching 

 nearer to the zenith. 





