BARNARD— SELF-LUMINOUS NIGHT HAZE. 229- 



of Alpha Ursae Majoris. There did not seem to be any evidence 

 of ordinary aurora, but this must have been auroral. It looked as 

 if a feeble moonlight were shining on large hazy clouds. 



Dec. 4, 15'' 50"". Horizontal strips of luminous haze parallel 

 with the horizon under Cassiopeia in the northwest. Sky whitish 

 everywhere, but no definite aurora. 16'' 10™: Like dim dawn all 

 under Cassiopeia. It consisted of sheets and strips of thin haze, 

 like hazy clouds illuminated by a quarter moon — very noticeable. 

 This was drifting toward the northeast. At iG'' 57™ the upper defi- 

 nite edge of this haze passed just below the Pleiades. It was 5° 

 below and extended 20° to the right of Cassiopeia to under the 

 Hyades. At 17'' 10™ it was nearing the northwest horizon. This 

 was the best specimen of luminous haze in many years. 



Dec. 21, 8*^ 40™. There seemed to be a long horizontal strip of 

 luminous haze 3°-4° wide passing through Zeta Ursse Majoris. No- 

 regular aurora. 9^ 25"": A considerable amount of broad luminous 

 haze west of the previous strip. 



1917, Aug. 10, 9*^ i8"\ Large faint auroral streamers from the 

 north horizon. 9'' 34™ : Several slender auroral streamers. lo'^ 

 50™ : Large areas of luminous haze in the east and near Beta Ursse 

 Minoris. 10'' 57™ : From the east horizon up to Alpha Arietis was- 

 a great sheet of faintly luminous haze slanting upward at the south 

 end. A large area of luminous haze through Beta Ursse Minoris 

 to the north horizon, several degrees wide. Feeble luminous haze 

 in high east sky. There were dark areas of pure sky free from 

 luminous haze. Another feeble luminosity in the low north. There 

 were no auroral streamers. By 11^ 20™ the luminous haze had 

 drifted to the east of Polaris. Large areas of it all over the sky. 

 It could be seen though the moon was up. (Moon last quarter 

 August 9.) This luminous condition was not due to moonlight. It 

 was the regular luminous haze seen in previous years. 



Aug. 15, 8^^ 50". Some masses of luminous haze. A great 

 V-shaped portion with one broad leg through the Square of Pe- 

 gasus, and the other 10° south of Altair. They met near the hori- 

 zon south of the square of Pegasus. These were perhaps " left 

 overs " from the previous night's aurora, but there was no trace of 

 aurora to-night. At 9^^ 55"^ the great stream of luminous haze lay 



