BARNARD— SELF-LUMINOUS NIGHT HAZE. 231 



number of other places. 15'* 50™: There were streaks and masses 

 of haze feebly luminous near the Pleiades ; some strong strips and 

 great sheets of it all over the sovith. These were not self-luminous, 

 but were all brought into view, evidently, by reflecting the first 

 feeble dawn. They were, however, beyond question the same stuff 

 that had recently appeared luminous at night. 



Aug. 24, 12^ 50"^. No aurora. There were horizontal strips 

 of luminous haze through the upper part of the Great Dipper with 

 a clear space below them, with more luminous haze lower down. 

 Great long masses through Hercules with clear space below ; then 

 more of it to the northwest horizon. 14'' 30"^: A rather strong 

 strip of luminous haze just above the handle of the Great Dipper 

 in the north. There was also a horizontal strip across Vega with a 

 clear space below it. No aurora. The sky where there was no 

 luminous haze was very clear, is*" 50"^: No aurora. 



Dec. 21, 14'' 10™. No aurora. 14^ 44": No aurora. I noticed 

 a little later what appeared to be a strong zodiacal light passing 

 through Spica in the southeast at 14'^ 57"^ ; this proved to be an 

 extended luminous haze. At 15'' 30"" the upper part of it passed 

 through Alpha and Epsilon and Beta Crateris and Gamma Hydrae. 

 The upper edge was rather definite. The whole mass extended 

 from the east horizon to beyond Crater. The motion of all this 

 was to the southeast. The sky was dark below Spica to the edge 

 of the haze. There was much, very diffused light extending above 

 Spica for 20° or more. 16^^ 25™: A diffused luminosity like dawn 

 all along the southeast horizon and upwards where the luminous 

 haze had drifted, no aurora. 17'' 5"": There was a dawn-like light 

 all about Alpha and Beta Librje. 17^' 30™: No aurora. The zo- 

 diacal light was very strong. No luminous haze anywhere. This 

 exhibition of luminous haze was very noticeable. At first it was 

 taken for the zodiacal light and thought to be unusually bright, but 

 it drifted to the southeast and disappeared before the zodiacal light 

 manifested itself. The light of the luminous haze was soft, like 

 that of the zodiacal light, but stronger, and there was a rather defi- 

 nite edge to it. There was no evidence of aurora at any time, 

 though looked for carefully. There was no other luminous haze. 

 This was extended from the east horizon to above Spica at first, to 

 the southeast, almost horizontally, beyond Alpha Crateris. 



