RECORD OF AUROTiAL PUENOMENA. 33 



laid at right angles to this arch, which had conie from the eastern horizon or bearing 54°. No 

 motion in the needle perceptible. 



22d. 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 through a very dense atmosphere. A 

 beam at 324°, elevated 15°; an arch from 234° to 121°, and some short beams at 76°. 



23d. At 9h., two parallel arches from 313° to 76°, supported on buttresses at both extremities. 

 The appearance resembled a bridge of light. At lib. 30m., the northern and eastern parts of 

 the sky were entirely free from Aurora. Some irregularly-curved streams extended from 99° to 

 234°, and dark clouds intervened between them. At midnight, three arches from 110° to 234°, 

 the upper one most brilliant. No perceptible interior motion of the Aurora. The needle moved 

 10° westward after nine. 



24th. At 9h. ]). m., Aurora appeared through the clouds and snow, traversing the zenith in the 

 direction of 65° and 245°. The needle moved eastward 1° 5'. At midnight, a beam from 99°, 

 of slender breadth, when near the horizon, dilated considerably in its ascent, and at its termination 

 in the zenith spread so as nearly to cover the upper part of the heavens. Another beam arose 

 from the same point, curved several degrees to the westward, and then proceeded to the zenith. 

 These beams quickly disappeared, but a low arch, extending from 279° to 65° remained stationary. 

 The needle moved westward, between nine and midnight, 1° 22'. 



25th. At 9h. p. m., faint beams at 324° and 144°. At midnight, a horizontal stream from 133° 

 to 223°, some beams at 324 D , and patches in several other parts; all very faint. 



26th. At 9h. p. m., a faint Aurora at 99°. At midnight, a mass of dense light burst forth, bear- 

 ing 65°, at an elevation of 20°, which presently curved round, and assumed the shape of a horse- 

 shoe. At that instant, a beam flashed from 324° to the nearest part of the curve, and immedi- 

 ately an arch proceeded upwards, and passed about 3° eastward of the zenith. The needle 

 moved eastward 12'. 



28th. At 8h. p. m., when daylight was perceptible to the westward, a stream of Aurora issued 

 from a dark mass of cloud bearing 110°, and proceeded upwards in the direction of 346°; but, 

 when it reached the zenith, the upper part inclined to the westward, and an arch was formed 

 from 110° to 290° reaching from one horizon to the other. Some smaller streams appeared 

 about 189°, lying parallel to a range of clouds which resembled it in color, both being a steel- 

 gray. The extremities of these streams pointed 121° and 257°. At 9h. p. m., clear weather. 

 Three arches appeared; one from 94° to 290°, elevated 80°, the other from 290°, passing about 

 2° east of the zenith, and the third went parallel to this, and united in the same points in the 

 horizon, but they were separated in the zenith by a stream of cloud. In two minutes afterwards, 

 the first arch disappeared, and the two others, closing in the zenith, formed one broad stream, 

 and passed off to the westward. Stars were faintly seen. At midnight, a very dense atmosphere 

 obscured the sky; neither stars nor Aurora visible. The needle, however, moved 35' westward 

 between nine and midnight. 



29th. A faint gleam of Aurora friuged the upper part of some dark clouds between 133° and 155°. 



30th. At 9h., a broad arch across the zenith from 88° to 290°, and the interior motion was rapid. 

 At midnight, an arch from 110° to 257°, elevated 20°. It separated in the zenith, and then 

 the light passed instantaneously down to each horizon. Needle moved westward. 



April 1st. The changes in the position of the needle this morning deserve some notice. At 8h. 

 a. m. it was nearly in the same position as at midnight; an hour afterwards it had moved 12' 

 eastward, and by eleven 10' more. At 8h. a. m., there was a mackerel sky to the north, the 

 strata of the clouds being vertical. Near the west horizon there was a layer of dense clouds, 

 which soon spread over the whole sky. At llh., these dark clouds gave place to a thin fleecy 

 sky, and many blue portions were seen. The needle then returned towards the westward, and 

 by four had reached within two minutes of the point at which it stood at 9h. a. m. At 9h. 30m. 

 p. m., the Aurora appeared through a hazy atmosphere, in an arch from 99° to 234°. 



5th. An arch passed from 88° to 178°, at a low elevation. At midnight, an arch, composed of 

 several streams apparently blended together, issued from 110°, and passed about 10° west of 

 the zenith to the horizon at 279". This arch separated in the zenith, and then each part passed 

 5 



