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The Knowledge Web
Instrument
Children
Astrolabe
Barometer 2
Beckett, Sir E
Breguet AL
Chronometer
Coherer
Galileo 2
Graham G
Hadley
Hardness Scale
Harrison, John
Hindley
Hooke, Robert
Metric System
oscilloscope
radiometer
Ramsden
Saccharimeter
Seismograph
sextant
Soleil
Spectroscope
Temperature scale
Tompion
Unit of Measurement