ABSTRACT
CIRCLES, or coronas, are in the habit of appearing in similar shapes during the spring season in certain years, particularly when the surface of the earth is covered in rather deep snow. This is what they look like: one circle, spacious and entirely white, forms in the clouds over the horizon, but with another on its inner edge, which is black from being more compressed in size. On their surface these very large circles have four lines, or round openings, distinguished by their saffron colour; between these, towards the south among white clouds that are filled with snow, appear two circles set opposite each other, one of which is black on its outer rim and, on the inner, white. The other, lower circle, in the centre of which the disk of the sun is seen (this is intersected by the upper circle, which has a different centre), is white on the outer rim and dark on the inner, though the nearer the sun it lies, the whiter it is. Moreover, opposite the sun, round about the centre of the very large circle which spreads, as I said, over the horizon, there appears a bow lying diagonally, with colours like those of a rainbow amid thick clouds, reddish on the outside, purple or saffron-yellow in the middle, and green below. 1
Circles, suddenforming and dense
Properties of tne circles
