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Show 508' Coiy'cé‘z'm'er aoout the Aurora Borealis. but cannot penetrate the ice; may it not, I fay, (a: a aotz'le owrobargoa'] break through that low atmolphere, andrun along in the. vacuum over the air towards the equator; diverging‘as tnevde- grees oflongitude enlarge ;‘ {trongly vrtible wnere deiifeil, and becoming lets whole as it more d1verges; till it finds a pafiage to the earth in more temperate climates, or is mingled With their upper air ? [MHP] Cory'efiure: aaozzt the AuroraBor ealis. 509 chord refting on the horizo n, and its arch elevated more orl efs above it as fee n from latitudes more or lefs diltant ; dark/l) in colour , but yetjz'gfioz'em‘ly - ti‘dig/[Dllré'flf to permit fome flats to 28. The ray: of electric mat be {een thro' it. ter iflhing out of a body, diverge '* by mut ually repelling each other, unlefs the re be fome conductin g body near, to receive them: and if tha t conducting body be at a greate r difiance, they will/[fl diverg e, 25. If fuch an operation of nature were really performed, would it not give all the appearances of an AURORA BOREALISP 26. And would not the auroras become more frequent after we approach of winter + .- not only becaufe more vitible in longer nights; but alfo becaufe in fummer the long pretence of the fun may foftcn the furface of the great ice cake, and render it a conduétor, by which the accumulation of electricity in the polar regions will be prevent- ed ? 27. The arzzzofp/ém' of tbe polar rogz'omi being made more denfe by the extreme cold, and all the moifture in that air being frozen; may not any great light arifing therein, and pafling through it, render its denfity in fome degree Villble during the night time, to thofe who live in the'rarer air 0f more fouthern latitudes ; and would it not in that cafe, although in itfelf a complete and full Circle, extending perhaps ten degrees from the P016, appear to fpeétators f0 placed (who could fee only a part ofit) in tbe form of afigmem;f1 01:; and then converge in order to enter it. May not this account for form: of the varieties of figure feen at times in the mot/om of the luminous mat ter of the aurorasz. fince it is poflible, that in pafl ing over the atmo-- fphere, from the north in all directions or meri- dians, towards the equator, the ray s of that matter may find in many places, portio ns of cloudy reg ion, or moif't atmofphere under the m, whi ch, (being in the natural or negative {fat e} may be fit to receive them, and towards whi ch theyrmay therefore converge : and when one of thofe receiv- ing bodies is more than faturated, they may aga za diverge from it, towards other furrou nding mafiEs of fuch humid atmofphere, and thus form the. crown; +, as they are called, and other figures,» mentioned in the hiftories of this meteor f R ‘lllll‘llllllllllill-1W" |
