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Vacuum Gauge
Eugène Bourdon, c. 1860
Decimal Scale
D. van den Bosch, 1821
Salinometer
A.P. How, 1850 - 1865
Log Timer
Rasmus Dekker, c. 1795 - c. 1812
Decimal Scale
D. van den Bosch, 1821
Polarising Filter
John Benjamin Dancer, c. 1880
Correction Circle
Peter Barlow, 1820 - 1825
Measuring Rod
anonymous, anonymous, 1750 - 1825
Metronome
Christiaan Welmeer, 1803
Het Amsterdams peil
anonymous, c. 1400 - c. 1950
Koperen instrument voor horizontale…
anonymous, 1700 - 1800