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Vacuum Gauge
Eugène Bourdon, c. 1860, measuring instrument, NG-MC-1062
Correction Circle
Peter Barlow, 1820 - 1825, measuring instrument, NG-MC-879
Measuring Rod
anonymous, anonymous, 1750 - 1825, measuring instrument, NG-MC-1889-19
Polarising Filter
John Benjamin Dancer, c. 1880, measuring instrument, NG-MC-1409