Phenomenon of two Rain-bows intersecting one another

Extract

An account of two intersecting rainbows, seen at Dunglass in East Lothian in July last, was communicated by Professor Playfair.

“At Dunglass, where I happened to be in the beginning of July last, our attention was called one evening, a little before sunset, to a very large and beautiful rainbow, formed on a cloud which hung over the sea, and from which a shower was falling at a considerable distance to the S. E. The sun was about 2° high, so that the arch was not much less than a semicircle, with its highest point elevated about 40°. At the point where the northern extremity of this arch touched the horizon, another arch seemed also to spring from the sea, diverging from the former at an angle of 3° or 4°, on the side toward the sun.