166 



21st. shaded off above through pink to aurora (greenish- 



yellow) colour at the extreme upper limits. 



21.15 A nebulous auroral band fringed the haze in the 

 S.E., waxing and waning for about an hour., 

 and finally disappeared. 



21 .50 A tenuous auroral belt developed near the S. side of 

 Mount Erebus, above the summit.* This trended 

 to the S.W. and drifted slowly to the N. It re- 

 kindled N. of Mount Erebus. 



22.15 An auroral nebulous fringe on the horizon haze in the 

 S.E., N.E., and N. During most of the period 

 between 20.00 and 22.00, a perceptibly strong 

 auroral glow illumined the slopes of Mount Erebus. 



23.30 Up till this hour a little aurora was noted on both 

 the N. and S. slopes of Mount Erebus. Faint 

 aurora in the N. to S.E. skv. 



24.00 Aurora to the N. 

 22nd, 9.00 No aurora visible, though the sky was clear and the* 

 moon young. 



12.00 A small aurora in the E.S.E. over Cape Barne. 



12.30 Curtains on the N. slope of Mount Erebus visible,, 

 though considerable daylight, from the N. 



13.00 No aurora. 



13.30 No aurora, only a greenish haze surrounding dense- 

 stratus clouds over McMurdo Sound. This lum- 

 inous effect was best defined in the S., as it was 

 obscured by daylight coming from the N. horizon. 



-i-'J-vr )• A nebulous aurora showed up to the S.E. 



16.00 An auroral glow appeared through a gap in stratus- 

 * clouds on the S. slope of Mount Erebus. Extensive 

 distinct auroral luminescence appeared on stratus' 

 clouds trending W.N. AV. and stretching from Mount 

 Erebus southwards. The same clouds were abund- 

 ant in the N. and W. sky, but were not luminous.. 

 The daylight had withdrawn but a short while 

 from the N. horizon. The strongest luminous effect 

 appeared on a cloud passing over Mount Erebus. 



16.45 A fairly strong luminous haze developed about the 

 horizon line of the Ross Island highlands. 



17.10 A nebulous glow on the N. end of the summit of 

 Mount Erebus, developing into a horizontal lum- 

 inous sheet between the two belts of stratus clouds 

 which we're in proximity to Mount Erebus, at the* 

 10,500-feet level. This persisted waxing and 

 waning in the same cloud-gap, suggestive of an 

 electric flow between the two clouds. The upper- 

 part of the nearer cloud, and the farther part of 

 the more distant cloud, were not lit up, as would he 

 the case were the luminous effect due to reflection 

 from a distant aurora. 



17.15 The above conditions continued; added to this also- 

 broad streamers passed upward to the heavens to 

 a great height. The two main streamers came 

 down respectively on the N. and S. side of the 

 summit of Mount Erebus. Other strong ones 

 descended on to and terminated abruptly in stratus 

 clouds which cut Mount Erebus at the 10,500-feet 

 level. 



