A dictionary of literature, the sciences and the arts, for popular use. A volume for universal reference. Containing over 20,000 articles pertaining to questions of agriculture, astronomy, architecture, biography, botany, chemistry, engineering, geography, geology, history, horticulture, literature, mechanics, medicine, mythology, natural history, physiology, and the various arts and sciences. Prepared under the supervision of a number of editors, and verified by comparison with the best authorities