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The Wing Major

‘It consists of a windmill, but one totally different in appearance and principle from all windmills known hitherto.’ This is a Ventimotor, designed by an Artillery Officer to save the German Milling Industry. It is a very early version of an electricity-producing wind turbine. Designed by Major Kurt Bilau, it makes use of principals from…

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An explosive business

These tools of war enabled centuries of explosive bloodshed. This Gem is an adjustable copper measure for gunpowder and shot. Without these, it would once have been impossible for riflemen and sportsmen to reliably measure the correct amount of powder for their weapon and launch projectiles. To work it, one would twist the bottom of…

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Theatre of machines

One of the oldest books in our collection, a guide for centuries of millwrights. This fascinating Gem is an enormous folio-sized book called the Theatrum Machinarum Universale of Groot Algemeen Moolen Boek, which translates as the Universal Theatre of Machines or Large General Mills Book. It was produced by Johannis van Zyl and Jan Schenk as a reference…

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