626 



APPENDIX. [No . IIL 



a nearly horizontal beam of light, a depressed arch was formed to the northward 

 of the zenith, from various parts of which pencils of light shot up directly towards 

 the south, and rising 40° or 50°. Portions of two smaller and concentric arches 

 were occasionally seen under the other. 



At 9h. the Aurora continued to exhibit modifications of the appearances 



above-described, g 



At midnight, an irregular mass of light, having a spirally twisted form, rose 

 in the horizon in the N. W. b. N. to the height of 60° apparently perpendicularly. 

 Then turning to the northward, it continued its course horizontally across the sky ; 

 and, lastly, bent suddenly and obliquely to terminate in the S. E. horizon. 



December 31st, 1820. 



Hour. Temp. Wind. 



A. M. 9h. 0m. - 40 Calm. Clear. Rapid pretty loud. No 



mist from it. 



llh. Oim -40 S.E.b.S. Light, do. 



Noon, —36 N.W. do. do. A few cirro-strati. Thin 



mist from the rapid. 



* 1 



' ;' r 



12h. 30m. —35 S.S.W. do. do. 

 2h. 30m. — 36 N. N.W. do. do.' No mist from the rapid, 



which was pretty quiet. 

 Bur round the candle. 

 6h. 35m. Calm. do. 



9h. 0m. -40 N. Light, do. 



Midnight, —42 W. do. do. 



At 6h. 35m. p.m., an arch-formed Aurora, 15° high, extremities bearing 

 N. b. W. and E. b. S, From its north end several rays rose to the height of 

 10° or 12°, having a direction to the south. 



At 9h. a zone of light, rising from the horizon, in the N. E. , swept round the 

 sky to the eastward and southward, with a gradual ascent, until it bore S. W., 

 and had an elevation of 35° ; from thence it gradually descended and finally 

 terminated in the N. W. b.N. point of the horizon. Near the eastern horizon, 

 this zone was continuous^ but towards the south it was composed of thin and 



parallel layers. 



* 



At midnight, the Aurora covered the sky in fleecy masses, having the same 



*t 



