394 Prof, Twining on the Aurora of 1859. 
4, Observations of Prof. ALEXANDER C. TWINING on the Aurora 
of Aug. 28th, 1859, made at West Point, New York. 
it is believed, making the local time 7! 19™). In about ten min- 
utes the southern boundary moved to Alpha Aquilae, and the 
rosy light had extended itself visibly over to the west, and 
streamers were seen in the northeast. Very soon the northern 
sky became variegated nearly up to the zenith with advancing 
bands and flakes of yellowish and reddish cloud with streamers 
intermixed. At a quarter before eight o’clock, by estimation of 
the true local time, the streamers in the north were numerous; 
and by careful observation they were perceived universally to 
move towards the west. 
_ At 84 35™ (by the watch) I looked again. A corona was then 
formed, and the auroral clouds and streamers were colored with 
b 
if improved, will determine the height of that auroral clou 
with an unparalled certainty and accuracy. There was also dur- 
ing this period another phenomenon equally remarkable and, 
if “tel observed in widely different latitudes, equally 
Ten 
valuable. 
or fifteen minutes before nine o’clock a bright j 
