- 
‘several times no’ 
392 Prof. Lyman on the Aurora of 1859. 
At 85 52™, arch at the south growing fainter and breaking up. - | 
Se "9 few minutes that quarter of the sky was nearly free from 
ight. 
At 8:54 an imperfect corona formed at an altitude of 69°. 
At 8:56 a better one with bright wisp at its center, alt. 72°. 
At 8:583, corona 724° apparently in vertical plane cutting 
alpha Aquile. (Azimuth of the star then, by calculation, 8° 
22' EK.) The corona at these times not very definitely formed. 
At 94 5m a bright mass of light noticed in the east, irregular, 
expanding, and stretching obliquely upwards and towards the 
south. At 910™ this was met by a similar irregular mass of light 
stretching around simultaneously from the west, forming an 1m- 
perfect band or arch, with very little light below it, its lower 
edge at this time having an altitude of 27° on the meridian. At 
9h 12™ its altitude was 20° 80’, at 9b 23m, 16° 15’, and at 9" 31, 
16°, soon after which it faded. While this second curtain was 
shutting down in the south, it was noticed that the light in the 
north was rising gradually. At 9% 26™ 30s its lower edge passed 
Polaris, and three minutes later was: at an altitude of 62°, 
leaving the sky below nearly free from auroral light. At the 
general with the direction of the dipping needle, its altitude was 
se ! g 
eae, The coronal point, however, was seldom or never suil- 
ciently d i 
purpose. In addition to the notes of the coronas before 9 o’cloc 
given above, the following were also made at the time. : 
At 9h 15m 30s altitude of C. 73°, very definite. — . ee 
: bright streak or cloud above C. (alt, 76°) lasted 13". 
i et eR a ae i oe e ‘ . 
Ee Re eet Se Soe TOE Te ele ce CaN ae eg aE on ESR tee Sheet Sota aes eee hh ale ba . i i ai ae ee = oe . . 
Se tere ais mers PENSAR TES ORE eS EPMO oc eT a ROEM TO HG eR Es ET aR ere EE PSE Cat Oe SS aA NE PT AEE NE ER ee ON Oe Lee TE eee Te eT eT Re 
efinite to make the observations of much Mee for 6 4 
