Records and results of magnetic survey of Pennsylvania and parts of adjacent States in 1840 and 1841, with someadditional records and results of 1834-35, 1843, and 1862, and map
Contributors: Bache, A. D. 1806-1867.
Series: Smithsonian Contributions to Knowledge, Vol. 13, Art. 8
Publisher: [s.n.]
Published: 1863
Place of publication: Washington, D.C
Format: Microform
Subjects: Magnetic testing.; Pennsylvania.