620 



APPENDIX. 



W. to 2° 20' W.: bright at S.W., 1° 55'W., 2° 15'W., 

 1° 58' W. : motion W.N.W. to S.E., 2° 12' W., W.' 

 1° 55' W., 2° 10' W. : faint mass at S.W., 1° 57' W.' 

 2° 05' W., 1° 50' W.: spiral band N.E. to E., 2° 00' 

 W., 1° 55' W., 1° 58' W., IMS' W., 1°55'W., 

 1° 48' W., 1° 55' W. : motion N. to E., 1° 48' W., 

 1° 55' W., 1° 48' W. 



Time at beginning 17 h 59 m 00 s 



ending 18 03 30 



Interval 4 30 



Temperature, observatory, — 49°, air, —58°. Calm, 

 blue sky, and misty. 



December 25th. — At 9 h a.m. the needle was vibrat- 

 ing in the same manner as when the aurora was 

 present ; and the sky was clear, except an arch of very 

 streaky and filmy clouds which extended from W. 

 across the zenith to E. The resemblance to the corus- 



cations was perfect, but I could not detect any motion ; 

 yet the needle indicated such ; for it varied in the read- 

 ings between 0° 30' E. and 0° 55' E. At noon a 

 light mass of cloud remained at E.b.S. ; the sun was 



