Gleason's new standard map of the world : on the projection of J.S. Christopher, Modern College, Blackheath, England ; scientifically and practically correct ; as "it is."1892.engMap of the globe stretched and flattened into a circular plane (azimuthal projection), with two movable arms to calculate time in places around the worldMap of the globe stretched and flattened into a circular plane.Includes longitude and time calculator and diagrams showing June and December solstices.Border shows "sun-time in minutes."Text on verso.