[ 1 57 ]. 
X. Account' of an extraordinary Appearance in a Mi/i.- 
By Mr. William Cockin; communicated by Jofeph 
Banks, Ffq. P. R. S. 
Read Feb. so, 1780, 
Lancafter, Sept, a, 1777V 
JANUARY 13; 1768, betwixt nine and ten in the 
morning, being on an eminence that overlooked 
fome low meadow ground, I obferved, in a direction op- 
polite to that of the fun, which Ihone very bright, and 
in a mill which covered the faid inclofures, an unufual 
meteor, which, without attempting to name it, I lhall de- 
fcribe as well , as I can by the help of the. following ; 
figure. 
At about the diftance of half a mile, and incurvated 
towards each other, like the lower ends of the common, < 
rainbow, there appeared in the mill two places of a pe- 
culiar brightnefs as reprefented at aa. They feemed (as 
is common) to reft upon the ground, were continued as 
high as the mill, and in breadth, perhaps, near half as 
much more as that of the iris. In the middle, between 
thefe two places, on the fame horizontal line, was a co- 
loured • 
