Beiträge zur Kenntniss des Wesens der Säcular-Variation des Erdmagnetismus

Results of Magnetic Observations Made by the Coast and Geodetic Survey Between July 1, 1902, and June 30, 1903

United States: Magnetic Declination Tables and Isogonic Charts for 1902, and Principal Facts Relating to the Earth's Magnetism

Land Magnetic Observations, 1905-1910

Report on the Survey of the Boundary-line Between Allegany and Garrett Counties [Maryland]: In Accordance with the Act Passed at the Session of the General Assembly of 1898 ...

The Broader Aspects of Research in Terrestrial Magnetism

Some of the Chief Problems in Terrestrial Magnetism and Electricity

United States Magnetic Declination Tables and Isogonic Charts for 1902: And, Principal Facts Relating to the Earth's Magnetism

The Earth's Magnestism

Land Magnetic Observations 1911-1913: And Reports on Special Researches

United States Magnetic Tables and Magnetic Charts for 1905

Land Magnetic Observations, 1914-1920

Ocean Magnetic Observations, 1905-1916: And Reports on Special Researches, Issue 175, Volume 3