Prof. E. Loomis on the Aurora of 1859. 79 
field of the telescope. At 8°57" a.m. the Horizontal pra | be 
0:0284 below the mean above referred to, showing a decrease of 0-0 
in the space of one hour. The variation of the needle underwent simi 
changes, decreasing rapidly until 9 35™, when it was ps 
the mean for the ten days mentioned above. After 8 adie magnetis 
instruments were registered every minute. a following ‘table contains 
the means for declination and horizontal intens 
Declination, Horizontal intensity. 
Between 74 and 8h a.m, 8° 2420 236264 
- Se re 8 22-23 2°33677 
i Se 20°! |S 8 8°52 2°35072 
Sarat poe 8 13:00 2°34711 
Pea Ive 8 22°86 2°34983 
Mtr P oe Mo): ea 8s OS RE 2°35160 
* Bee ate 8 37°54 2°35539 
Bs Qos 8 37:40 2°35755 
: eee ee 8 38°46 2°34358 
: : a gs 8 85°83 2°35479 
. 6G 2 8 34°21 2:35412 
The above ike do not give the greatest range; that Ln declination 
being 1° 88; _ - intensity 0°03197 of the absolute u 
At 6h 10m p e first traces of an aurora were shasitied towards 
S.E. by S. The - tua appearance increased rapidly, spreading to- 
wards S.W. 
b 6" 40™ p.m. A rosy color appearing on the clouds in S.E. and S.W. 
6" 50™, Splendid aurora. Red streamers very bright, S.E., 8.W., 
and W. by S. visible to an altitude of 50° or 90°. One very bright 
peitiah Streamer in S.W. by S. looking as if there oa a thin red cur- 
before a beautiful white luminous curtain. Lower edge about 12° 
ton the horizon. Well defined in 8. by W. and SSW. ; upper por- 
7" 23m pw. A well defined arch of white light 10° vy 12° high 
above the bank of cloud before mentioned, extending from §.S.E. to 
W. sad W. being brightest in W.S.W. 
Very faintly red in S.E. Two pink streamers, Two 
whi ie one in the zodiac, and the other through the cross. 
wT .u. Paint rosy light in oun E. nearly as high as the zenith. 
™ yoy P.M. White streamers in S.W. by 
72 49m pw, A large patch of ie bright light i in S.E., white below, 
reddish above. - 
7h 50m A white luminous cloud appearing in S.W. About 30 
high, below the southern cross, a rosy streamer in S.E. by E. very faint. 
