0. N. Rood—Duration of Flashes of Lightning. 165 
me no time for the study of the components of the flashes. 
(3.) During the following month, at about the same hour in 
the night, I again observed near the horizon clouds illuminated 
Jy 4 more distant storm. The multiple flashes were once more | 
These Streaks were observed quite often and with perfect dis- 
tinctness, though the figures just given are to be considered 
i of with these, if not actually 
being provided with a fan. When this dise was revolving at 
eV 
times observed to make at least two complete Sig apes 
i the 
