328 Mr. GanneTr’s Hifarical Regifer 
Sept. 25. At 730’, an auroral arc appeared. Its meridi- 
onal height about 53°. At 7°45’, ftria proceeded from the 
arc towards the zenith—their colour, in. general, white. 
Thofe ftrie, from being regular, foon.appeared like broken 
fheets of light. At 8^ ro', the various interrupted ftris, rif- 
ing from weft-fouth-weft to eaft-fouth-eaft, concentered at 
about 19? fouth of the zenith. Glades, diverging from that 
point, extended to 15° in length, in'every direction. After re- 
‘maining in this ftate about feven minutes, the northward radii 
‘recoiled towards the centre. ‘The whole phenomenon, from 
that time, decreafed rapidly. - At 820’, nothing more than a 
common Aurora was vifible. The ftriæ from weft-north-weft 
were very red, and attended with corrufcations. At 8^ 26’, 
.the height of the luminous arc not more than 40°. Two or 
three fmall ftrie ; alfo, very thin white corrufcations obferva- 
ble, whofe horizontal extent was from weft to north, and ver- 
tical to 10° fouth of the zenith. At 8^ 30’, corrufcations 
eeafed, and the light in the north fcarcely fo much as to attract 
notice. At 8^ 37’, the light increafed.—Striz began to afcend 
from the eaft, very red—The general arc appeared to generate 
.new arcs, which travelled fouthward, till the uttermoft reached 
the zenith at 8" 43’. Between the arcs, which were not quite 
regular, proper {ky appeared,—in {fome parts, 5° in width, in 
others 3°. At 8^ 46’, regular ftrie afcended from north-weft 
to eaft, to 5° fouth of the zenith, and terminated in a feg- 
ment of a circle, whofe diameter was about 9°. A quantity 
of the vapour, in appearance like a {mall, thin, white, irre- 
ular cloud, colle&ed at about 6° fouth of the fore-mentioned 
fegment. At 854’, the ftriæ continued ;—the fegment, in 
which they terminate, enlarged.—From nine o'clock, a gradual 
iue till the whole difappeared. Oa. 
