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2
Non-Commercial Use
2
Category
Mathematics
2
Maker
Barnes Bros.
1
Object type
calculating rule
2
Place
England
1
England, United Kingdom
1
Saint Louis city, Missouri, United States
1
St Louis
1
Material
boxwood
1
calculators, steel, paper, glass
1
case, card, cloth
1
complete
1
Date
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Mathematical reckoning rule
1750-1800
Barnes Brothers' constantnometer and ampere rule
1903