558 



APPENDIX. 



[No. III. 



5th. The atmosphere very dense and hazy. The needle had been disturbed 

 in the night, and shewed this morning a considerable change of position. At 

 midnight Aurora gleamed through the haze in two arches, the extremities 54' 

 and 234°, and they passed the zenith. One of them turned towards the north, 

 and the other towards the south. The needle moved to the eastward, as on 

 February 3d and January 1 4th, when the Aurora appeared in a similar position. 



6th. At midnight, Aurora was perceived across the zenith 279° and 99 

 gleaming through a very dense atmosphere, and when snow was falling ; two 

 stars only were visible. Motion of the needle since 9h. p. m. 28' westward. 



8th. A faint stream at 99° towards the zenith. 



9th. At 9h. p. m. a beam at 290° ; at 1 lh., a broad arch traversed the zenith 

 from 290° to 110°, which remained until 45' after midnight, and then disappear- 

 ed at bearing 99°. Motion of the needle westward. 



10th. At midnight, an arch resembling a horse-shoe, the extremities of 

 which bore 99° and 76° ; from each of these points streams were projected 

 across the zenith towards 290°, but they did not reach the opposite horizon. 

 They were of a faint greyish-yellow colour. The stars shone brilliantly through 

 the columns of light ; moon very bright. The needle was not the least affected. 

 I have observed that the needle is usually most disturbed by the appearance 

 of the Aurora in dense hazy weather, 



11th. At three p. m. a cloud extended in an arch from 99° to 279° , elevated 



30°, which bore a strong resemblance to the Aurora, particularly at the end at 



279° , from whence some beams were proj ected towards the zenith. The needle 



was not affected. 



12th. At 8h. 30' p. m. faint curved streams in the zenith. At 9h. an arch 

 from 99° to 279°, exactly similar in shape to the cloud seen yesterday. The 

 colour resembled the halo round the moon. The needle was not affected. At 

 1 1 h. 40' the coruscations occupied a considerable portion of the northern part of 

 the sky lying in parallel arches from 76° to 279°. The centre one was brilliant, 

 and the motion, resembling a volume of smoke, passed from the former bearing 

 towards the latter. Some arches appeared in the zenith lying 65° and 245°, and 

 flashes darted with instantaneous motion from these towards the point to which 

 their extremities were directed. The needle betrayed a slight motion eastward. 

 At 12h. a broad band of light from 302° to 54°, elevated 20°. 



