232 



BARNARD— SELF-LUMINOUS NIGHT HAZE. 



1 91 8, Sept. 2, 9^^ I/"". A strip of luminous haze 4° wide ran 

 diagonally across the Square of Pegasus from Beta and beyond 

 Gamma Pegasi. 9'' 24^ : A similar mass ran from the Dolphin to 

 Alpha Pegasi. No aurora. 10'' 35™: No aurora. A region of 

 luminous haze over the handle of the Dipper in the northwest. 

 There seems to have been a great deal of it on this night. 11^ 25": 

 Luminous haze all over the north ; a great sheet of it with clear 

 spaces here and there. No aurora on this night, but a great deal 

 of luminous haze. 



Sept. 8, 9'' 30™. At this time there was a great deal of luminous 

 haze all over the northwest, as high as 4° or 5° above the Dipper. 

 It was quite strong. A long strip of it 5° wide extended from 

 above Gamma Pegasi to Aries. Though there was no aurora on 

 this night, there was a great deal of luminous haze. 



Oct. 5, 12'' 30™. The sky was luminous. There w^as no aurora. 

 It was about as bright as if a quarter moon were, say, in the west. 

 It was uniform and w^as apparently not the regular light of lumi- 

 nous haze. Could readily read my watch by this light. The ]\Iilky 

 Way was very dim with it. 



I have gone to some length in the descriptions and locations of 

 the masses, etc., of luminous haze because so little is known of the 

 origin of its light that it is believed the observations may sometime 

 be more important than they appear to be at present. 



The following tabular scheme will roughly show the frequency 

 of luminous haze as indicated by my records. The numbers indi- 

 cate the number of nights on which it was seen during the month. 



1910. 1911. 1912. 1913- I9I4- 1915- 1916 



1917. 1918 



January. . . 

 February. . 

 March . . . . 



April 



May 



June 



July 



August . . . 

 September . 

 October. . . 

 November . 

 December . 



As will be seen from the above table, January, April and May 



