The mirror of alchemy
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Of Natural and Supernatural...
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Fr. Rogeri Bacon Opera...
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The Root of the World and the...
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Roger Bacon's Letter:...
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On Signs (Opus Maius, Part 3,...
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The 'Opus majus' of Roger...
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Roger Bacon's Selected Occult...
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The Mirror of Alchemy...
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Roger Bacons Philosophy of...
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The 'Opus Majus' of Roger...
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Moral Philosophy
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Roger Bacon's Letter
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The Mirror of Alchimy ...
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Roger Bacon's Life and Work
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The Letter of Roger Bacon...
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The 'Opus Majus' of Roger...
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Magical Letter of Roger Bacon
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Opera Hactenus Inedita;...
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The 'Opus Majus' of Roger...
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Optical Science
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Part of the Opus Tertium of...
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The 'Opus Majus' ......
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Fratris Rogeri Bacon...
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