. 
C. Dewey on the Aurora of 1859. 253 
last quarter. The aurora continued till daylight, when it grad- 
mi faded away. 
he evening of Aug. 29th was clear; and at 85 45™ the aurora 
was again visible, but very much less extended and brilliant 
than on the preceding night. There were thin, misty clouds of 
anebulous appearance, with occasional streamers of a pale white 
light, sometimes merging into red. 
On the night of Aug. 30th I observed no unusual appearance. 
Aug. 81st the sky was covered with a dense mass of clouds; 
but the existence of the aurora was evident from the clearness 
of the night. After midnight the clouds disappeared, and the 
display was magnificent. All the characteristics of the night of 
the 28th were repeated; but the arch was rather lower along the 
southern horizon. A fiery bank was formed in the south, from 
which rays were constantly darting upward, and the whole sky 
Was @ gorgeous canopy of crimson and gold. This was most 
te from 1h 15™ to 1h 45™, but was continued till almost day- 
g 
Sept. Ist was cloudy, and I saw no indications of the aurora. 
Sept. 2d there were dense clouds, yet the aurora might be oc- 
“sionally seen. It was confined to the N. and N.E., and was 
Pattcularly bright from 98 51™ to 114, | 
Sept. 3d was clear. At 8850™ the aurora appeared in the 
NN.E. and W. The light was yellow and white, with traces 
b ‘rimson and green, At 104 an imperfect corona was formed, 
Wtalmost instantly disappeared. Others followed, but none of 
Were complete. f 
Sept. 4. The same phenomena were observed, but much di- 
minished in brilliancy. 
Sept. 5. No trace of the aurora was visible. 
" Observations at Rochester, N.Y. (lat. 48° 8’), by Prof. C. DEWEY. 
ae aurora of Aug, 28th was exceedingly splendid both be- 
aa after midnight, with the corona a little south of the ze- 
fais and exhibited many colors, with red or crimson predomi- 
ist Ist. The aurora began late in the evening, and exhib- 
“oy usual appearances. : goa 
the Fs 2d at 1a. M. it was cloudy, but very bright and red in 
there wi the light increased rapidly and extended. At 2 a. x. 
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