An Aurora Observed in Missouri 109 
11:47 P. M. For about eight minutes, long dark waves, eae 
with the horizon, started from the upper edge of the and 
crossed upward and over the cloud-like areas, at a rate ‘of about 
0° per second. These areas had the appearance of fields of grain 
being blown by the wind. (F ig. 6). The waves had no relation 
to the variation in brightness and color, which continued until 
11:55 p. m., _— they all stopped, leaving only faint remnants o 
the cloudy area 
17:55 P.M. — continued to come and go, although they 
_ were ees shorter and fainter. 
2:00 Midnight. Little change was going on, and only an occa- 
Pi colorless ray was seen 
1:05 to 4:25 A. M. No more rays were observed and nothing 
was left but the arch, which remained as bright as ever until dawn 
It was gradually overpowered by the light of dawn, and was last 
observed at 4:25 a. m., just a 2 minutes before sunrise. 
the ea was similar to that of the moon; it lighted up the whole 
sky with scattered nee es blotted out the fainter stars. 
were very weak, which is in ao with Angot, hea states that 
in general, less coloring is observed on very clear nights than 
on partly cloudy or foggy nights. 
Observations at Madison, Wisconsin, May 29th. 
Simultaneously with the observations at Allenton, Mrs. Phil Rau, 
of Kirkwood, Missouri, observed the same aurora from Madison, 
Wisconsin, about 320 miles north of Allenton. Early in the eve- 
