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 | Jeremy Cherfas

August 16, 2018

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