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

credit:: Ordnance Survey

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Parts

Case for Zenith Sector, British, 1840

Wooden box containing spare levels with spare eyepieces and filters, 1840, for for Zenith sector designed by Sir George Airy and used on Principal Triangulation from 1842-1850