Contributions to terrestrial magnetism, variation of compass, as observed at 50 of principal maritime stations from earliest times to present, together with equations for each station, from which values may be predicted and annual rates of change found
Contributors: United States. Hydrographic Office.
Publisher: U.S. G.P.O.
Published: 1895
Place of publication: [Washington?]
Format: Microform
Subjects: Geomagnetism.