Geological Survey (U.S.)1 map : col. ; 45 x 72 cm on sheet 51 x 78 cmAt top of sheet: U.S. Geological survey. Seventeenth annual report, Part I, Pl. II.JPEGG 3701 .C9 1900 .G3501365550539015091194954engPublicDistribution of the Magnetic Declination in the United States in 1900MapsUnited StatesUniversity of Michigan