Genres
- Income tax
- Taxation
- Machinery
- Manufactures
- Babbage, charles, 1792-1871
- History
- Mathematics
- Science
- Calculators
- Tables
- Notation
- Life insurance
- Mortality
- Natural theology
- Great Exhibition (1851 : London, England)
- Mathematicians
- Biography
- Economics
- Factory system
- Industrial revolution
- Economie
- Industriële ontwikkeling
- Textiel
- Fabrik
- Maschine
- Quelle
- Wirtschaft
- Economic aspects
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