158 Mr. cock in's Account of an 
loured appearance like deb , a , bed , whofe bafe could not 
at moft fubtend an angle of above ten or twelve degrees, 
and whofe interior parts were thus variegated. The cen- 
ter a was dark and irregularly terminated, as if made by 
the fhadow of fome object not bigger than an ordinary 
fheaf of corn. Next this center was a curved fpace bb , 
of a yellowifh flame colour. To this fucceeded another 
curved fpace of nearly the fame dark caft as the center, 
feemingly tinged with a faint hue of green, and very 
evenly bounded on each fide, as is fhewn at cc. After 
thefe came on the terminating ring, which was coloured 
very much in the manner of the common rainbow, ex- 
cept that the tints were not quite fo vivid (as if owing to 
the effedf of a yellowifh tinge, which feemingly entered 
into the compofition of all the colours) nor their bounda- 
ries fo well defined. The center of the image appeared 
to be exactly in the line of afpedt (as it is called) or one 
conceived to be drawn from the fun through the eye of 
the fpedtator ; and it may be obferved from the figure, 
that thefe curve fpaces were not fegments of perfect cir- 
cles, but formed like the ends of concentric ellipfes, whofe 
tranfverfe axifes were perpendicular to the horizon. 
To the above defeription of the image it may be ne- 
.ceflary to add the following particulars which attended 
-it. 
The 
