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Surveyor's chain with thermometer and spirit level, 1860-1890
- maker:
- J M Drummond

Surveyor's steel surveying chain fitted with mercury thermometer and spirit level, patented by J. M. Drummond, Brooklyn, New York, USA in 1859.
Details
- Category:
- Surveying
- Object Number:
- 1956-107
- Materials:
- steel (metal), brass (copper, zinc alloy), nickel silver (nickel, copper, zinc alloy), glass, mercury and alcohol
- Measurements:
-
overall: 35 mm x 245 mm x 140 mm, .265kg
- type:
- surveying chain
- credit:
- Andrade, J.F.da C.