158 An Observation of the 



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the zone : In the eastern, they might be cliscemed dis- 

 tinctly through the whole breadth. The zone did not 

 appear in the arch of either a great or parallel circle in 

 the heavens, but irregulai' between both, its height being 

 out of the proportion of either, and its casps toward the 

 horizon on both sides, especially the western, declines 

 much more northerly than regularity would admit ; be- 

 sides several breaks seemed to appear in the zone at 

 times, which nevertheless were immediately filled up. 

 The breadth of the zone was various in different parts of 

 it, and in its successive motion southward, which at first 

 was more rapid, till it become stationary, and then mov- 

 ed northward, till the whole appearance evanished. 



The following observations were made during the ap- 

 pearance. 



viii. S6. — Zone of auroral light extended almost across. 

 the heavens ; rising from about N. W. by W, and de- 

 scending about E. by S. — The southernmost or last 

 bright star in the tail of iirsa major, in the northern limb 

 of the zone, where its breadth was equal to a third part 

 of the distance between that star and the bright star of 

 the crown. — Lyra, in the middle of the zone, where the 

 breadth of the zone was equal to the third part of the 

 distance between Lyra and Aquila. — The whole zone 

 north of the stars in Draco, vulgarly called the diamond. — 

 Brightest light in the western part ; more faint in the 

 eastern. 



ix. 6. — Zone of auroral light partly evanishing in the 

 east. — The whole zone south of Lyra — western part 

 very bright — its southern limb touches the northern 

 stars of the crov/n — its breadth nearly as above, 



ix. 10. — ^Bright star of the crown in the middle of the 

 zone, where the appearance is very bright and luminous, 

 but decreaseth toward the meridian ; eastward of which 

 the whole appearance is evanished. 



ix. 15. — The appearance stationary in the crown — 

 bright westward of it, and extending about half way to 

 the horizon — breadth not so great as at first — from Ly- 

 ra half way of the crowji almost wholly evanished. 



ix. 16. — Western bright appearance continues sta- 

 tionary. — A new coruscation or stream of faint auroral 



