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1 . 
IL Account of an Aurora Borealfs feen in 
Ireland in September 1725 *jin a Letter from 
Arthur Dobbs, Efq*, to his Brother the Reve^ 
rend Mr, Richard Dobbs, Fe//otP of Trinity- 
Cqllcge, Dublin, 
? I 
CaJUe Dohhsy Sept, 29 , 1725 '. 
I Here fend you an Account of an Aurora Borealh^ 
.which I faw here the '^Stb, and z6th Inftant, 
with Reflexions upon it ; which, if compar’d with o- 
thers, or the fame view’d at other Places, -may in fome 
meafure contribute to clear up the nature of it. ^ 
I obferv’d, that the. Theatre of Light forming an 
irregular variable Curve, was, as at mod times former- 
ly, trom E. N. E- to W. N- W. the Horizon and whole 
Hemifphere ferene, little or no Wind, what there was, 
feem’d Northerly. The Teeming Dawn, or Stage of 
Light generally continu’d in an irregular Curve ; the 
one Point in the two firft Nights wliild I obferv’d it, 
began near the Horizon, near N.N.E. the other Point 
was at W.N.W. the Height of the Arch not exceeding 
20 Degrees, in which there feem’d to be a continual 
Dawn : Under that Field of Light feem’d to be a dark 
Cloud, which, however, was a clear Sky, not filled 
with that luminous Vapour ; becaufe all the Stars 
appear’d diftindly and twinkling thro’ it. Whenever 
that Light rofe about 10 Degrees higher, to about 30 
Degrees, then FlaQies, or Corufcations follow’d al- 
ternately, and feemed to be Pillars or Beams of Light, 
udiich follow’d or fucceeded one another, and by that 
means 
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