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Non-Commercial Use
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King George III
2
On Display
Science Museum
1
Science City
1
Object type
acoustic equipment
2
sonometers
1
sonometers; acoustic equipment
1
speaking trumpets
1
speaking trumpets; acoustic equipment
1
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maker unknown
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place unknown
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Demainbray's speaking trumpet
1700-1752
Sonometer
Sonometer, before 1752.
1701-1750
