Our Daily Bread 16 - Water and Power http://ow.ly/dcKc30loDEM The rotary quern was perhaps the first labour-saving device. Using water power, rather than muscles, to turn the millstone made it even more efficient. Without watermills, it is doubtful whether ancient Romans could have enjoyed their bread and circuses. Because they require capital investment and skilled workers, watermills also set the trend for concentration in the food industry.

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how to clear cache internet explorer, Sep 15 2018 on stream.jeremycherfas.net