Magnetic variation in the United States
Subtitle: being a compilation of observations made in America from the year 1640 to the present date
By: tabulated and arranged for the use of surveyors, with a brief account of the nature of terrestrial magnetism, its various theories as to the origin, its change in intensity and direction, and the progress of magnetic observation. By J. B. Stone.
Publisher: [Smith & Vanden Houten, Printers]
Published: 1878
Place of publication: New York
Language: eng
Number of pages: 139
Subjects: Geomagnetism -- United States; Geomagnetism -- Secular variations