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Era: 19th century
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Subject: Chemistry
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Subject: Agriculture
Agriculture
2
Architecture
2
Building
Chemistry
2
Literature
2
Reclamation of land
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2
Study and teaching
2
Taxation
1
Defensive (Military science)
1
Description and travel
1
Engineers
1
Finance, Personal
1
Fortification
1
History
1
Irrigation
1
Land tenure
1
Orangemen
1
Police
1
Public works
1
Railroads
1
School management and organization
1
Shooting
1
Social problems
1
Stocks
1
Strategy
1
Wills and administrations
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