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Measuring Rod
anonymous, anonymous, 1750 - 1825, measuring instrument, NG-MC-1889-19
Polarising Filter
John Benjamin Dancer, c. 1880, measuring instrument, NG-MC-1409
Vacuum Gauge
Eugène Bourdon, c. 1860, measuring instrument, NG-MC-1062
Artificial Horizon
anonymous, anonymous, anonymous, c. 1830 - c. 1865, measuring instrument, NG-MC-1031