They were from 4 mm. (one-fifth inch) to 6 ctm. (two inches) in diameter, of a dark red color in the centre, and lighter toward the periphery. They arise and disappear very quickly, and, as regards form, color and induration of the base, they are identical...
The Untoward effects of drugs: a pharmacological and clinical manual - Seite 123
von Louis Lewin - 1883 - 216 Seiten