Popular Astronomy in 19th-century Philadelphia
Ebenezer Maxwell Mansion 200 W. Tulpehocken Street, Philadelphia, PA, United States"No Limit to Space" with Robert Hicks, Ph.D. Visitors to Ebenezer Maxwell Mansion might discover a curious object in the children’s room, a large 1871 cardboard planisphere that shows the stars, a rotating disk adjustable to the appearance of the night sky at any date or time. Designed for schools and the curious public, the planisphere…