Greenwich and Washington prime meridians. Included with Illinois map: tables giving "Highest mountains and plateaus," "Longest rivers of the world," and "Largest lakes." Numbered 39-42. 2 maps on one sheet: back to back, col.; 30 x 46 cm. and 31 x 21 cm., sheet 35 x 56 cm. This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.