Zenith sector, British, 1840

Made:
1840 in London
designer:
George Biddell Airy

Zenith sector designed by Sir George Airy and used on Principal Triangulation from 1842-1850

Details

Category:
Surveying
Object Number:
1876-1202
type:
zenith sector
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Ordnance Survey

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