Prof. Loomis on the Aurora of 1859. 387 
— bank me pps on the southern horizon had risen to a height 
0 18°. 
At gh 18™ the point of convergence of the streamers w 
nearly equidistant from the stars above named, but somewhat 
nearer to « Cygni 
At gh 23m thie ‘dark segment in the south was quite regular, 
and not more than ten degrees in Aerts and the bright border 
was very strongly illumined; while the dark segment in the 
north had almost entirely Rieapeanit and there was but little 
light in the northern portion of the heavens, nearer the north 
horizon than about forty degrees. 
At 98 33m a narrow beam of white light shot up from the 
west and another similar beam shot up from the east, which met 
at the magnetic zenith, forming a pretty well defined bow, and 
being nearly half of a great circle of the sphere. Throughout 
the entire portion of the heavens north of this arc, there was 
scarcely any trace of auroral light; while in the south the dark 
Segment was complete, and the diffuse illumination above it — 
very ser de that is, the a conditions of the aurora were e 
rising more than 40° above the southern hitiogn = it seemed 
as if the light was entirely disappearing, passing away towards 
the south, when very suddenly it increased in a ae and 
rose higher in the heavens. ay it became —_ a 
gnt. Soon they covered the entire heavens, see down 
shank to the eters) horizon. The hght in many places, aes 
larly in the south, at an elevation of about 45°, me 0 
brilliant crimson, and then commenced a succession of fs 
like it a light rolling up towards the magnetic zenith. 
Atl s point of oye ence of the streamers was 
about idist rom « Delphini and « Cygni and about three de- 
grees east of the hee joining tices two A soa The flashes still 
continued, but the illumination was less inten 
At 10h ‘10m P.M. the light had become very ge and diffuse, 
is aera in the north. 
on dae Pp. M. almost the entire heavens appeared of that 
auil’ atte color which usually characterizes the dark segment 
near the horizon; but at 10! 19™ the whole heavens brightened 
up again with diffuse of straw-colored light, all inclin- 
ing towards the magnetic zenith. 
