622 



APPENDIX. 



[No. III. 



December 28th, 1820. 



Hour. Temp. Wind. 



A.M. 9 —48 Calm. Very clear. Thick mist over the rapid, and stra- 

 tus or mist in the low grounds. 



10 -48.4 S.W. Light. 



11 -47 W.b.N. do. Clear. 



Noon. —47 W. do. do. f Thermometer on the surface of 

 P M 2 —47 Calm do < ^ e r iver under the ice 32°. At the 



( depth of two fathoms 42°. 

 6 -50.5 N.N. W. Light. do. 

 9 -51 Calm. do. 



lOh. 30m. -49 N. Light. do. Hazy in the horizon. 

 Midnight -49 do. do. do. 



29th, a.m. 1 N.N.E. do. do. Fog bank in the south. Rapid 



pretty loud. 



At 6h. p. m., the Aurora, in an arched form, extended from the S.E. horizon 

 to the N.W., across the zenith. This arch was at one time composed of a 

 bright homogeneous stream of light about 8° broad ; at other times, it split into 

 parallel beams, their ends directed to the east and west. These beams receded 

 from each other laterally, until they were separated by a space of clear blue 

 sky, more than twice their breadths, speedily re-uniting again, however, to 

 form the uninterrupted arch. A fainter arch appeared to the northward of the 

 other, springing from, and terminating at, the same points in the horizon, but 

 having an apparent curvature so much greater as to keep their centres 5° or 

 6° apart. 



At 8h. The low fog to the southward had increased, and minute crystals of 

 snow were falling, but the zenith remained clear. 



At this time there existed a zone of light in the north, about 20° high, whose 

 extremities, uniting with those of a similar zone in the south, dipped suddenly 

 down to the horizon in the S.E. and N.W. points. 



At 9h. In a calm and clear atmosphere, there were five arches, each about 

 4° broad ; one crossed the zenith, another was elevated about 60° above the 

 northern horizon ; and there were three in the southern half of the sky, at ele- 

 vations of 45°, 6°, and 80°. Their light was faint, and their extremities con- 

 verged, so as to terminate conjointly in the N.W. b. N. and S.E. b. S. points. 



