The National Geographic Magazine Volume 4, articles published in 1892 and 1893. The Evolution of Commerce: Annual Address by the President, Gardiner G. Hubbard Studies of Muir Glacier, Alaska Geography of the Air: Annual Report by Vice-President General A. W. Greely The Mother Maps of the United States An Expedition through the Yukon District The North American Deserts The Alaskan Boundary Survey Collinson's Arctic Journey Notes: Topographic Survey of Canada Lieutenant Peary's Crossing of northern Greenland Geographic Prizes