Iridescent Clouds

Abstract

YOUR correspondent Mr. W. Larden, writing on the subject of solar halos (p. 344), referred also to rose-crimson and green colours on clouds. It is quite unnecessary to be at 6000 feet altitude to observe iridescent clouds, for we do so frequently here during the summer months, at about 350 feet above sea-level. They appear generally about an hour before sunset and cease at sunset, and we always look out for them when seeing the suitable kind of delicate cirrus cloud in fine wavy fleecy streaks in the sky near the sun at the right hour; and are generally rewarded by the sight of the exquisite rose and green ripples of nacreous brilliancy, affording a striking contrast to the ordinary sunset colouring.