The circulation in infancy and childhood is not only more rapid than in the adult, but easily excited to greater vehemence of action; the nervous system, too, is so susceptible, that the slightest causes of irritation produce strong and powerful impressions: the result in either case is diseased action in the frame, productive of fever, convulsions, etc. "The Maternal Management of Children, in Health and Disease." by Thomas Bull, M.D.