Optical balance level, after a type used in the 17th Century

Made:
1700-1799 in England
maker:
Unknown

Optical balance level, after a type used in the 17th Century, British, 1700-1799

Levelling is the method used by surveyors to determine the relative heights of different points on the earth's surface, but originally referred to the simple procedure of determining the horizontal. This crude instrument has a lead tube hanging from a fixed thread inside a protective case, with a slit at one end and a cross-hair at the other. The device would have been so easily disturbed that its use would have been extremely limited.

On display

Science Museum: Mathematics: The Winton Gallery

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Details

Category:
Surveying
Object Number:
1913-258/1
Materials:
brass (copper, zinc alloy), glass, iron, lead (metal), mahogany (wood), steel (metal), wood (unidentified), wood veneer
type:
level
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Court, Thomas Henry

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