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              1 Archival description results for Instruments

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              Theodolite - designed by Leonard Digges - 1850
              IND-IIA-F043 · Fond · 1850

              This item was an instrument used in surveying land, alignment, testing, and calibrating optical Instruments. It is basically a refracting telescope. Whose optical elements tilt angles with high accuracy of the order of arcsecs.

               Digges, Leonard