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Stirrups, or Foot Rests— The riders' feet mounted the horse rising from the ground quickly just as a ladder raises them.
Stirrups, or Foot Rests— The riders' feet mounted the horse rising from the ground quickly just as a ladder raises them.

Watermill— Whoever thinks that watermills were invented in ancient times is all wrong.
Watermill— Whoever thinks that watermills were invented in ancient times is all wrong.

Winged Mill— The winged mill which now wants to be driven by the winds is said to have been unknown to the Romans.
Winged Mill— The winged mill which now wants to be driven by the winds is said to have been unknown to the Romans.

Olive Oil— The olives, while still bitter, are shaken from the tree and on being pressed give a supply of rich olive oil.
Olive Oil— The olives, while still bitter, are shaken from the tree and on being pressed give a supply of rich olive oil.

Sugar— The picture that you see will teach you in very many ways the art in which sugar is made.
Sugar— The picture that you see will teach you in very many ways the art in which sugar is made.

Oil Colors— The famous Master Eyck's discovered oil as a convenience for painters
Oil Colors— The famous Master Eyck's discovered oil as a convenience for painters

Spectacles— Also invented were eyeglasses which remove dark veils from the eyes.
Spectacles— Also invented were eyeglasses which remove dark veils from the eyes.

Longitudes of the Earth Found from the Deviation of the Magnet from the Pole
Longitudes of the Earth Found from the Deviation of the Magnet from the Pole

Polishing Armor—Swords, battle-axes, all the weapons of war, are polished in our time, not in antiquity.
Polishing Armor—Swords, battle-axes, all the weapons of war, are polished in our time, not in antiquity.

Astrolabe— Americus Vespuccius found the cross with the four stars in the silent night.
Astrolabe— Americus Vespuccius found the cross with the four stars in the silent night.