174 TRANSACTIONS OF THE [APR. 2, 
bility of taking photographs of the auroral displays of like inten- 
sity and persistency of form. 
“In closing this account I am pleased to present a letter re- 
ceived from our fellow member, Mr. C. A. Post.” 
New York, March 38st, 1894. 
Professor J. EK. Rees, 
DrAR Str. —I send you some notes of the aurora, observed at Bayport 
on the evening of March 30th. 
At 7:45 Eastern time I noticed a distinct greenish light, due west, 
which extended to the zenith. To my surprise I found another band in 
the east meeting the western one at the zenith. At this point it soon 
attained its greatest brilliancy and breadth, while the northern and 
southern sky both remained dark. 
At 8 p.m, this band, broadest at the zenith and narrowing down at 
each horizon, was so brilliant that I could read the seconds hand on my 
watch. Below Jupiter and in the region of Taurus streamers of green- 
ish white light appeared, followed by frequent and very brilliant white 
flashes. Next a very bright red streak shot from nearly due west to the 
zenith. This was followed by streamers spreading from the eastern and 
western skies to the north and converging at the zenith, where the sky 
was brilliantly red. These streaks, of which some were red and others 
green, formed a half dome with the apex in the zenith. The southern 
sky now became also illuminated until the stripes formed a perfect 
dome, suggesting to my mind the frame of an open umbrella with a 
hole in the centre for the handle, for at the zenith there was a distinct 
condensation with a sharply defined black centre. 
At 8:10 the southern side of the dome extended below Rigel, Sirius 
and the constellation of Corvus. 
At 8:15 the region of Taurus became bright red, fringed with very 
bright wisps of green. At this time the northern sky was very feebly 
illuminated with light greenish white streaks, At about this time 
waves of luminous mist rolled from the southern horizon to the zenith. 
The southern sky was otherwise clear and there a was strong breeze 
from the north. 
At 8:17 the light suddenly faded away, leaving a red glow due west, 
from which there were constant flashes like distant lightning. 
At 8:20 waves of light shot up from the south, looking like reflections 
from a bull’s-eye lantern thrown on the southern sky, and moved rapidly 
upwards. During all of this time the northern sky was dull and inac- 
tive and almost without light. 
At 8:22 the red glow became very brilliant about west-northwest. In 
the northeast a moderately brilliant green streamer next appeared, ac- 
