Model of Magnetic Surface
Model of Magnetic Surface
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- Description
- This is a visual representation of the changes in magnetic declination as observed in the early 1840s by Alexander Dallas Bache, then a professor of natural philosophy at Girard College in Philadelphia, and soon to become director of the U.S. Coast Survey. It was made by Ferdinand Engel, a German artisan who immigrated to the United States around 1848, and found work with the Coast Survey. It was probably made for the Smithsonian Institution, which published Bache's account of his magnetic observations in 1859.
- Ref: A. D. Bache, "Discussion of Magnetic and Meteorological Observations Made at the Girard College Observatory, Philadelphia, from 1840 to 1845," Smithsonian Institution Contributions to Knowledge 11 (1859).
- Location
- Currently not on view
- Object Name
- model
- date made
- around 1859
- place made
- United States: District of Columbia
- Measurements
- overall: 10 in x 25 13/32 in x 21 3/16 in; 25.4 cm x 64.516 cm x 53.848 cm
- overall: 3 3/4 in x 8 3/8 in x 10 in; 9.525 cm x 21.2725 cm x 25.4 cm
- ID Number
- PH.314745
- catalog number
- 314745
- accession number
- 210834
- subject
- Science & Scientific Instruments
- See more items in
- Medicine and Science: Physical Sciences
- Data Source
- National Museum of American History
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