Records and results of a magnetic survey of Pennsylvania and parts of adjacent states
Subtitle: in 1840 and 1841, with some additional records and results of 1834-35, 1843 and 1862, and a map.
By: By A. D. Bache.
Series: Smithsonian contributions to knowledge. [vol. XIII, art. 8]; Smithsonian Institution publication 166.
Publisher: Smithsonian Institution
Published: 1863
Place of publication: [Washington
Language: eng
Number of pages: 82
Subjects: Geomagnetism -- Pennsylvania.