Pivoted page-display atlas consists of pivoted changeable transparent foil pages which can be changed to form new maps

摘要

The atlas has individual map sections printed on transparent foil. The transparent foil pages are pivoted to each other on an axis. The binding can be unscrewed so that individual foil pages can be changed, added or removed. The legend on the maps is so arranged that the legend printed on one foil page never covers that on another.