George Frederick Chambers, Weather Facts and Predictions (1877)
“ Clouds drifting about at sunset, from whatever quarter, betoken rough weather. Dusky clouds, or clouds of the hue of tarnished silver are a sign of hail. If traces of blue are visible the hail will be small, if traces of yellow it will be large. It was the opinion of Sir J. Herschel that "anvil-shaped" clouds are likely to be speedily followed by a gale of wind. The most cloudy countries are those where the wind is most variable, as Britain; the least cloudy countries are those in which the wind is least variable, as Egypt. If small clouds increase, expect rain. ”
