Government roads may subsidize rubber tires that roll in a way that delays other innovations for many decades.

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The Iron Duke was the first machine in the UK used to roll sheet rubber and cotton together and vulcanise them to make waterproof fabric.

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On the day of the San Francisco Giants World Series parade, I made my way to the corner of California and Montgomery where I was sure I had a pretty good vantage to watch the players roll by in their rubber-wheeled cable cars.

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