lower end of the curtains, there was a distinct tinge of orange-yellow or violet. 

 The light was moving backwards and forwards. 



This aurora almost immediately disappeared, and did not return until 20.40 

 when it showed as a single glow in arch form low down on the horizon in the N.W., 

 disappearing behind Cape Adare in N. 20 E. 



The next phase consisted in the appearance of a second glow at an altitude 

 of about 15, from North to N. 20 E., where it went behind Cape Adare. This 

 upper glow increased in intensity, broadened at the end resting on Cape Adare 

 and spread towards the N.W. Its northern end gradually doubled and one portion 

 rose to an altitude of 20, while two long streamers were given off towards the 

 zenith at North and N. 20 W. The lower glow now disappeared. The aurora then 

 became very faint, the glow broke up, and the light seemed to concentrate into 

 definite streamers, arranged in the form of a curved arch from North to N.W. 

 and back to N. 20 W., but soon the glow reasserted itself without any change 

 in the shape of the arch. 



At 21 hours, the aurora again assumed the form of a simple arch from N.W. 

 to North, vivid green with a tinge of yellow, and with streamers shooting towards 

 the zenith to an altitude of 5-12. The arch afterwards broke up into streamers 

 and faded away. 



A vivid glow next formed from North to N. 10 W., and from it streamers 

 shot towards the zenith. It afterwards spread in arch form towards the west, 

 and another bright spot appeared above Cape Adare in N. 30 E. 



Finally, an uninternipted glow in the form of an arch .appeared from the 

 N.W. to Cape Adare in N. 30 E. (at 21-13 hours). This remained for a few 

 minutes, now continuous and now breaking into streamers. For 10 minutes, 

 the aurora then concentrated into a vivid glow from North to N. 20 E. ; from the 

 glow, streamers shot towards the zenith, reaching an altitude between 30 and 40. 

 This was the highest altitude reached during the display, which faded away 

 between 21-30 and 21-45. 



2. INTENSITY OF AURORA AT CAPE ADARE. 



There can be no doubt that the intrinsic brightness of the aurora was far greater 

 at Cape Adare than at Cape Evans. The example cited at the conclusion of the last 

 section as descriptive of an aurora of inferior brilliance would have been an aurora 

 of remarkable brilliance at Cape Evans. Further evidence on this point is abundant. 

 The appearance of colour (chiefly green) was the rule at Cape Adare, not the exception ; 

 mention is made on one occasion of the light of the aurora being seen reflected from an 

 iceberg ; a note appears to the effect that the light of the full moon " is not sufficient 

 to hide a brilliant aurora," a result totally at variance with the observations at Cape 

 Evans. 



In addition, Major Priestley, who was also a member of the Shackleton Expedition 



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