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keyword: Perpetual motion – 4 free books.

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A Budget of Paradoxes, Volume I

David Eugene Smith (editor) and Augustus De Morgan (Author)

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A Budget of Paradoxes, Volume I
David Eugene Smith (editor) and Augustus De Morgan (Author)
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A Budget of Paradoxes, Volume II

David Eugene Smith (editor) and Augustus De Morgan (Author)

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A Budget of Paradoxes, Volume II
David Eugene Smith (editor) and Augustus De Morgan (Author)
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Perpetual Motion

Henry Dircks and Percy Verance

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Perpetual Motion
Henry Dircks and Percy Verance
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Bangerter's Inventions; His Marvelous Time Clock

Everett Lincoln King (editor)

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Bangerter's Inventions; His Marvelous Time Clock
Everett Lincoln King (editor)
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