Title: Heroes of invention
Subjects: Economic conditions, History, Industrial revolution, Inventions, Inventors, Social conditions, Great britain, history, 19th century, Inventors--history, Inventors--great britain--history--19th century, Industrial revolution--great britain, Inventions--history, Inventions--great britain--history--19th century, T26.g7 m22 2007, 609.41
Places: Great Britain
Time periods: 18th century, 19th century