Surveyor's chain with thermometer and spirit level, 1860-1890

Surveyor's steel surveying chain fitted with mercury

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Surveyor's steel surveying chain fitted with mercury
Science Museum Group
© The Board of Trustees of the Science Museum

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.