Results of observations made at the United States Coast and Geodetic Survey Magnetic Observatory at Cheltenham, Md., in ... and ... /
Department of Commerce, U.S. Coast and Geodetic Survey.

Description

Viewability

Item Link Original Source
Full view   Pennsylvania State University
Full view   Pennsylvania State University
Full view   Pennsylvania State University
Full view   Pennsylvania State University
Full view   Pennsylvania State University
Full view   Pennsylvania State University
Full view   c.1 1901/04-1919/20 University of Chicago
Full view   1901-1904 University of Michigan
Full view   1901/04 Princeton University
Full view   1905-06 1905-1906 The Ohio State University
Full view   1905/06-1907/08 Princeton University
Full view   1905-1906 University of Michigan
Full view   1907-08 1907-1908 The Ohio State University
Full view   1907-1908 University of Michigan
Full view   1909-10 1909-1910 The Ohio State University
Full view   1909/10-1911/12 Princeton University
Full view   1909-1910 University of Michigan
Full view   1911-12 1911-1912 The Ohio State University
Full view   1911-1912 University of Michigan
Full view   1913-14 The Ohio State University
Full view   1913-1914 University of Michigan
Full view   1915/16 Princeton University
Full view   1915-1916 University of Michigan
Full view   1917/18 Princeton University
Full view   1917-1918 University of Michigan
Full view   1919-1920 University of Michigan
Full view   1921-24 1921-1924 The Ohio State University
Full view   1921/1922 University of Michigan
Full view   1923-1926 University of Michigan
Full view   1925-28 1925-1928 The Ohio State University
Full view   1929-1936 University of Michigan
Full view   1931-32 1931-1932 The Ohio State University
Full view   1933-34 1933-1934 The Ohio State University
Full view   1935-36 The Ohio State University