228 BARNARD— SELF-LUMINOUS NIGHT HAZE. 



Possibly there was also a slight auroral light, but it was mostly 

 luminous haze. This was the most striking display of luminous 

 haze I have seen. In the intervening spaces the sky was pure and 

 dark. The aurora seemed dead at moonrise, when I stopped the 

 exposure on the comet. 



Sept. i6, S^ 30™. The sky in the southeast was luminous nearly 

 as high as Gamma Pegasi, like approaching moon rise. There was 

 no streakiness in the sky, but I think there was uniform luminosity. 

 The sky was not like that of the night before. No aurora at any 

 time. 



Sept. 22, 10'^ o"". There were great broad and extended masses 

 of luminous haze over the northwest with clear, dark spaces be- 

 tween. Great areas of it were also present south of the zenith. No 

 aurora. 



191 5, July 2. No aurora, but the night was uniformly luminous. 

 July 12, 11'^ 30"^. No aurora. Luminous haze for 10° below 



Polaris to Gamma Ursse Majoris. A feeble sheeting of it extended 

 to the north horizon ; its upper edge was quite definite. Above it 

 the sky was dark. No aurora. This haze seemed to be confined 

 to the region described. The other parts of the sky were free from 

 it. At 11^ 50™ the luminous haze had drifted to the right and 

 toward the horizon. It was then horizontal and about 20° below 

 Polaris. Above it the sky was dark, while below it was as bright 

 as the Milky Way to the right of it. At 12^ 25"^ there seemed to be 

 more of this, especially to the left of and below Jupiter. There 

 was no aurora. The sky was not very pure. 13^ o™: In the east, 

 all about the stars in Aries was a large luminous region almost as 

 bright as the ]\lilky Way ; very large, like a great diffused cloud. 

 There were no fluctuations in its light. At 13*^ 30" this haze was 

 about, above and to the right of the Pleiades. It was as bright as 

 the Milky Way. It was large and almost like dimly luminous 

 clouds. There seemed to be a considerable amount of it near the 

 Great Dipper and to the right of the dipper under the pole. 



1916, Feb. 2, 14'' 20'". No aurora, but the sky very luminous — a" 

 luminous night. The brightness increased near the horizon. 



Aug. 6, 13*^ 30™. There was a region of luminous haze under 

 the pole which seemed to be densest 5° above and 5° to the right 



