[ 33 + ] 
of the whole, and indeed almod without the lead 
external variation. An internal undulating motion of 
the particles condituting the white luminous matter of 
the arch was neverthelefs difcernible, from the firft 
to the lad moment of it’s exigence. No dars were 
vilible through the vapour itfelf, but two or three 
appeared at a fmall didance from it. Thefe, how* 
ever, were much obfcured by the interpolition of 
fome thin whitilh clouds, with which that part of 
the atmofphere was at this time covered. Not the 
fainted: traces of a proper Aurora Borealis , either 
before the fird appearance, during the continuance, 
or after the extinction of the meteor, were to be feen. 
Several young people were viewing it, when I went 
into the dreet ; who feemed, according to cudom, 
not a little alarmed at fo unufual a fight. One of 
them told me, that the arch began to be form- 
ed about a quarter before nine. In other parts of the 
city this wonderful phenomenon was likewife ob* 
ferved, both by townfmen and members of the Uni- 
verfity, not without fome degree of adonilhment and 
furprize. A little pad nine o’clock the extremities of 
the arch grew faint, as did foon after the whole body 
of the luminous vapour itfelf. About 9 h 2o / the 
fummit, or highed part, of the arch, a few degrees 
to the N. of the zenith, only remained ; which con- 
tinued gradually decreafing ’till g h 27', when the 
whole totally difappeared. 
With regard to the weather, the morning of the 
23d was dark and lowring ; but the remainder of 
the day, from 10 11 45' A. M. to fun-fet, was bright 
and clear, though cold out of the fun. The wind 
’till fix P. M. was northerly, and blew pretty frefh, 
I but 
