. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. â p- No. III.] APPEARANCES OF THE AURORA. 555 tion, the needle pointed as at midnight; but in about two minutes, the arch descended towards the east, and then the needle gradually returned eastward to its zero*, in which position it remained until the coruscation had dis- appeared. At Ih. a. m., Aurora visible in patches, 279° and 99°, and a beam 346°, the needle then stood at 348° 16' having moved eastward 34' since midnight. At 9h. p.
. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. â p- No. III.] APPEARANCES OF THE AURORA. 555 tion, the needle pointed as at midnight; but in about two minutes, the arch descended towards the east, and then the needle gradually returned eastward to its zero*, in which position it remained until the coruscation had dis- appeared. At Ih. a. m., Aurora visible in patches, 279° and 99°, and a beam 346°, the needle then stood at 348° 16' having moved eastward 34' since midnight. At 9h. p. m., January 15th, the needle had attained the usual position at that hour, the aurora then appeared in the zenith. At midnight, a waving irregular arch continued across the zenith from 279° to 99°, and a rapid interior motion passed from the former to the latter direction. Motion of the needle westward. 16th. At 12h. 20' westward, faint streams from 99°, inclining to the west- ward. 20th. At llh., an arch crossed the zenith; and at midnight, a patch appeared 54°, lying parallel to the horizon. 21st. An arch from 99° to 212°, elevation about 10°. At midnight, a broad patch in the zenith. Slender beams rose from 234° and 31°, which were prolonged to the zenith, and came almost in contact with this patch, at the same time a low arch proceeded from 279° to 54°. Between nine and midnight, the needle moved westward 32 minutes. 22nd. At 9h. p. m., an arched horizontal stream from 110° to 54°. At mid- night no Aurora perceptible, yet the needle had changed its position. 23rd. 9h. p. m., a brilliant arch across the zenith, from 279° to 99°, com- posed of slender beams, lying parallel to each other. The motion passed from 99° to the zenith. This arch separated in the zenith. The westward part disappeared entirely, but a column of light remained at 99°, motion of the needle westward. At 12h. thick hazy weather, no Aurora visib
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Keywords: ., bookcentury1800, booksubjectscientificexpeditions, bookyear1823
