Types of clouds as described by the author: a; a; exhibits the character of the cirro-cumulus; as also its appearance in the distance. b; b; a light and dark cirro-stratus; the former taken just before the commencement of wet weather; the latter in the twilight of the evening; when dew was falling: the smaller ones show its appearance in the distance. c; c; the mixed and the distinct cumulo-stratus; the latter in it's most regular state; as sometimes seen at the approach of thunder srms and after showers.[S. l.]: Taylor; 1803.From: Luke Howard; On the Modifications of Clouds / Luke Howard.W36/9385 plate VII opposite page 10London; British Library.