(CELESTIAL.) Barritt, Leon; and Serviss, Garrett P. The Barritt-Serviss Star and Planet Finder - Northern Hemisphere. Moveable circular star chart riveted between a base board and a die-cut top frame. 15x15 inches; some staining and light wear but generally surviving very well. New York, 1906
A handy device to show the visible stars and constellations of the heavens at any given hour of the day, any day of the year. "Revolve the map until the day of the month desired stands opposite the hour of the day you wish, and that portion of the map showing within the opening below, will present the stars and planets in view at that hour. Hold the map over your head - the top north, and you will see the stars just as they appear in the heavens."