J. M. Schaeberle—Aurora of September 12-18, 1881. 341 
Art. XLVI.—On the Remarkable Aurera of September 12-138, 
1881; by J. M. ScHAEBERLE. 
THE night of Sept. 12-13, 1881, witnessed one of the grand- 
est displays of aurora ever seen in this latitude. Beginning 
soon after sunset and lasting until the approach of day, the 
various phenomena which presented themselves during this 
time are deserving of being placed on permanent record. 
The following are some of the notes taken during the night: 
7 30™—An or n time. <A grand continuous arch 
seen spanning the northeastern sky, beginning in the horizon at 
and en ing ; altitude of highest point of 
second ioe Snel aae by the first and 10° from it, quite bright. 
donee between the arches clear as any part of the sky. 
the wre Sinise of the large arc are streamers 
inclined 70° to the hori 
7" 37, Four bright ives in the east, 15° long, 14° wide, 
and 9° from each © 
Pa. Bright. oe 40° long, 13° broad, E. 10° N., 
poght auroral light in northern horizon; most intense, N. 40° E. 
bn Broad sheet of streamers in the east ; horizontal mo- 
tion rth east to west, very marked; rate, 1° in 8 seconds of 
time. Pre ask has disappeare 
TS Dark se ment ; greatest altitude Scat Noe E 
r rs 15° long; a detached one in Cassiopsi, 45° 
som: the bistiacit; ee moving westward at the rate of 1° in 3 
seconds, 
8" 5", Dark segment 5° high; streamers form one continuous 
sheet of light. In the northeast streamers start 2° from horizon 
and in their motion westward — through the dark space. 
8", 127-20", —— arch from N. 30° W. to N. 60° E.; 
greatest elevation, 10°; met streamers, from a to 5° in 
are mga ne ion it. Pent Cavey in the eas 
Streamers in rth 15° long; dark seit 6° 
hig, eae very poset ine. 
8° 33", aerate Sorts of light in N.N.E. ; rch, 
eo. the present time only the gure twilight 
could be seen. Mou about three hours high; signs of return- 
mg alae dark segment 7° high. 
Bright streamer 40° long, N. 10° E. 
1D 548 Three arches; whole Caines sky covered with 
Streamers 45° in lengt 
11" 56", Streamers of a reddish tinge, 55° in length; arch 
broken near the north point ; western portion wanting. 
