No. III.] APPEARANCES OF THE AURORA. 563 



extended from 279° to 346°. Motion of the needle 10 minutes eastward 

 since nine. 



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5th. A low stream from 121° to 189°, at an elevation of 10 degrees. No 

 change in the position of the needle. 



6th. The atmosphere very hazy, and snow fell. No Aurora visible, but 

 the needle moved 30 minutes westward between nine and midnight. 



7th. Dense Atmosphere. No Aurora or stars visible, but the needle moved 

 westward 20 minutes between nine and midnight. 



8th. At 6h. 30', p. m. Aurora appeared, whilst the western horizon was tinged 

 with the rays of the recently departed sun, in two beams from 99° extended 

 to the zenith. At 9h. p. m., a brilliant stream from 121° to 212°, elevated 10 



degrees. A beam, having a wavy form, ascended from 99° to the zenith ; its 



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colour a bright yellow ; the stars were seen distinctly through it. No change 

 in the needle. At midnight, Aurora was diffused over a great portion of the 

 sky. A broad arch crossed the zenith, whose extremities were at 88° and 



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200°, but they did not reach either horizon. A band stretched from 279° to 

 76°, elevated 12 degrees, from which three beams were prolonged nearly to 



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the zenith between 302° and 335°. Needle moved 1° 5' westward. 



9th. At nine, Aurora brilliant and variable; the interior motion passed 

 rapidly from 234° to 54°. An arch across the zenith, extremities 279° and 9$ 

 A horizontal band from 245° to 76°. No change in the needle. At midnight, 

 some patches bearing 324°. An arch was instantly projected from that, bear- 

 ing across the zenith to 1 44°. This arch separated in the zenith, and both 

 parts passed off against the wind to the westward. The needle moved 30 

 minutes westward between nine and 1 1 h. 30m. 



11th. At 9h. p. m., a waving arch passed from 290° to 88°, about 2° east 

 of the zenith, and ' reached from one horizon to the other. An elliptical arch 

 from 313° to 76°, elevated about 50°. At llh., two waving streams stretched 

 from 279° to 43°, and some beams shot from both these extremities towards 

 the zenith, but more numerously from 279°. The needle had moved 1° 8' 

 westward between nine and eleven. Whilst I was looking at the instrument, 

 a flash darted towards the zenith from a low beam bearing 9°, and the needle im- 

 mediately moved 8' westward ; but the arch having in a few seconds passed over 

 to the south, the needle returned eastward to its first position. At midnight, a 

 beam arose at 54°, darted to the zenith, and then the upper extremity turned 



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