330 Mr. cavallo’s Account of a luminous Appearance , See, 
eclipfed ; but the hides of- this luminous arch were more faint 
and tranfparent. 
The inclofed drawing fhews its appearance at about half an 
hour paft ten o’clock. At about three quarters pad: ten it began 
to lofe its brightnefs, hr if at a, and then vanifhed gradually, fo 
that at eleven o’clock none of it could be perceived. As loon 
as any part of this arch loft its denfe whitenefs, the ftars ap^ 
peared through it quite didindt, fo that it could not be a cloud* 
The light alfo feemed to vanifri without change of place ; for 
it did not appear to be difperfed through the Iky, or to be driven 
in any direction. 
This extraordinary appearance to me feemed quite didindt 
from the aurora borealis for the following reafons, viz. becaufe 
it eclipfed the {tars over which it pafied ; becaufe its light, or 
rather its white appearance, was ftationary and not lambent ; 
and becaufe its diredtion was from eaft to wed. 
The atmofphere was in other refpedts very ferene, the liars diin* 
ing very bright, and no cloud appearing. The northern light 
was exceedingly faint, and very low about the northern point of 
the horizon. The wind was nearly north- ead, and it could be 
jud perceived in the dreets. 
I am, &c» 
