To George Washington, President of the United States of America, this magnetic atlas or variation chart, is humbly inscribed
By: by John Churchman.
Contributors: American Imprint Collection (Library of Congress); Thomas Jefferson Library Collection (Library of Congress)
Publisher: Published according to Act of Congress
Published: 1790
Place of publication: [Philadelphia]
Language: eng
Subjects: Geomagnetism -- Northern Hemisphere -- Early works to 1800.
Genres: Early works to 1800.
Other titles: Magnetic atlas or variation chart
Notes: Evans 22406
Caption title.
Depicts northern hemisphere only.
LC copy has printed mounted volvelle.
With (in pocket of): Churchman, John. An explanation of the magnetic atlas, or variation chart, hereunto annexed. Philadelphia : Printed by James & Johnson ..., 1790.