No. III.] 



APPEARANCES OF THE AURORA. 



565 



At midnight, a faint stream of Aurora reached from 65° to 279°, elevation 25°. 

 No change in the needle. 



19th. At 9h. p. m. a faint arch from 121° to 212°, elevated 25°. At mid- 

 night, low streams from 144° to 324°, which nearly encircled the horizon. 

 Seven beams were projected upwards, from different parts of this zone. Their 

 points did not meet in the zenith, but terminated about 3° short of that part. 

 The whole appearance strongly resembled an artificial globe, the zone being the 

 equator, and the beams the meridian lines. The needle moved 25' eastward 

 between nine and midnight, but I observed it to move gradually westward, as 

 these beams were disappearing. Immediately after they had ceased to be 

 visible, an arch was exhibited crossing the zenith, in the direction of the 

 magnetic meridian. The needle still continued to recede westward, until it 

 rested nearly in the position at which it was at 9h. p. m. 



20th. At 9h., an arch from 99° to 279°. A beam at 99° pointing towards 

 the zenith. A stream from 257° to 290°. At midnight, a low stream from 

 302° to 54°, along which the interior motion passed very rapidly. The needle 

 moved 1° westward. The sky was overspread with fleecy clouds. 



21st. At Uh. a.m., some clouds lying parallel to the horizon between 346° 

 and 76° strongly resembled the Aurora. At 9h. p. m. Aurora in a bright arch 

 from 99° to 280°, passing within 3° of the zenith. This descended to the 

 eastward against the wind. At midnight two beams darted from 144°, one 

 shot across the zenith to 290°, the end of the other curved round just beyond 

 the zenith, and, in a few minutes, both of them rushed back to 144°, and then 

 disappeared. A waving stream reached from 279° to 99°, elevated 12°, several 

 beams were projected upwards from this stream. A beam darted from 54° 

 across the zenith, and immediately after this flash, the lower extremity of the 

 beam moved, round to 99°, and an arch was formed from 99° to 279°. The 

 needle moved nearly 2° westward, between nine and midnight. At 12h. 30m., 

 Aurora generally diffused over the sky. A brilliant arch crossed the zenith 

 from 279° to 110° ; this soon afterwards separated, so as to form three arches 

 parallel to each other. Some beams laid at right angles to this arch, which 

 had come from the eastern horizon or bearing 54°. No motion in the needle 

 perceptible. 



22nd. At 9h., Aurora in an arch from 290° to 88°, a bright band from 88° 

 to 65°. At midnight, the following appearances of the Aurora were visible 



