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.

By: Material type: TextTextSeries: Smithsonian contributions to knowledge. [vol. XIII, art. 8] | Smithsonian Institution publication 166Publication details: [Washington, Smithsonian Institution, 1863]Description: vi, 82 p. chart. 33 cmSubject(s): LOC classification:
  • Q11 .S68 vol. 13
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