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Contents 1
Chap.Ⅰ．Coal 1
Chap.Ⅱ．The Steam-engine 16
Chap.Ⅲ．The Locomotive and the Rail-way 25
Chap.Ⅳ．Oil 39
Chap.Ⅴ．Mass Production 52
Chap.Ⅵ．Signals and Signalling 69
Chap.Ⅶ．The Telescope 90
Chap.Ⅷ．Medicine 115
Chap.Ⅸ．The Future 143
Glossary 153