600 APPENDIX. 



A beam at N. E. caused it to move 0° 10' E., where it 

 stood a few seconds, but on some more beams uniting, 

 so as to form a mass at N. E., the needle directly moved 

 to 0° 20' E. Again, the mass was diffused in a filmy 

 form from E. to W.b. S. and the marked end retro- 

 graded to 0° 0'. Another change to a concentrated 

 mass at E.N. E. took it from 35' to 48' E. The aurora 

 again became spread, and the needle was stationary 

 at 0° 0'. 



December 12th. — At 10 h p. m. the weather was 

 gloomy, overcast, and calm, but from the unusual 

 brightness at a time of new moon, and the distinctness 

 with which objects appeared, there was every reason to 

 suppose the aurora was then very brilliant above the 

 clouds. On entering the observatory I saw the needle 

 vibrating rapidly to the westward, and having taken the 

 time, 16 h 37 m s , chronometer number 1., I watched 

 it move from 0° 10' E. to 3° 20' W., to 10' E. to 

 2° 50' W., to 0° 40' W., to 3° 55' W., to 0° 8' E., to 

 2° 30' W., to 20' E., to 2° 30' W., to 0° 08' E., to 

 2° 30' W., to 0° 40' W., to 2° 50' W., to 1° 20' W., to 

 2° 20' W., to 1° 10 W., to 2° 42' W., to 1° 55' W., 

 to 2° 58' W., to 1° 58' W., to 3° 10' W., to 2° 5' W., 

 to 3 00' W., to 2° 50' W., to 3° 20' W., to 2° 8' W., 

 to 2° 30' W., to 1° 35' W., where it remained station- 

 ary five seconds, and vibrated quickly to 1° 28' W., to 

 2° 10' W., to 1° 45' W., to 1° 58', to 1° 05' W., to 

 1° 10' W., to 0° 40' W., to 0° 55' W., to 0° 18' E., to 

 0° 20' E., where it again became stationary only seven 

 seconds, then moved slowly to 00° 00', still slower to 

 0° 20' W., to 00° 00', to 0° 15' W., to 0° 10' E., to 

 00° 00', to 0° 12' E., to 0° 12' W., to 0° 5' W., and 

 quicker to 0° 48' W., to 1° 12" W., to 1° 05" W., at 

 which point it was steady three seconds, when it moved 



