Surveying altimeter, American, 1854-1870
- Made:
- 1854-1870 in United States
- maker:
- Hall Colby
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LicenseSurveying altimeter No 1, invented by Hall Colby, New York
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© The Board of Trustees of the Science Museum
Surveying altimeter No 1, invented by Hall Colby, New York, United States, 1854-1870
