Records and results of a magnetic survey of Pennsylvania and parts of adjacent states, in 1840 and 1841, with some additional records and results of 1834-35, 1843 and 1862, and a map.
Bache, A. D. 1806-1867.
Records and results of a magnetic survey of Pennsylvania and parts of adjacent states, in 1840 and 1841, with some additional records and results of 1834-35, 1843 and 1862, and a map. By A. D. Bache. - [Washington, Smithsonian Institution, 1863] - vi, 82 p. chart. 33 cm. - Smithsonian contributions to knowledge. [vol. XIII, art. 8] Smithsonian Institution publication 166. .
s 13000062
Geomagnetism--Pennsylvania.
Q11 / .S68 vol. 13
Records and results of a magnetic survey of Pennsylvania and parts of adjacent states, in 1840 and 1841, with some additional records and results of 1834-35, 1843 and 1862, and a map. By A. D. Bache. - [Washington, Smithsonian Institution, 1863] - vi, 82 p. chart. 33 cm. - Smithsonian contributions to knowledge. [vol. XIII, art. 8] Smithsonian Institution publication 166. .
s 13000062
Geomagnetism--Pennsylvania.
Q11 / .S68 vol. 13