Three Unsung Inventions: Tarmac, Time and Propellers

The Open University’s Dr James Warren gives us the lowdown on three unsung inventions and the stories behind their ingenious inventors.

1: Tarmac

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Construction of a macadam road, “Boonsborough Turnpike Road” between Hagerstown and Boonsboro, Maryland, 1823. Public domain

2: Daylight saving time

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William Willett. Copyright: Alamy
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Home Office poster

3: Marine Screw Propeller Blade

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Henrietta Vansittart
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Patent for the screw-propeller

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