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Ideas of Roger Bacon, by Text
[English, 1214 - 1292, Born in Ilchester. Said to have invented gunpowder. Franciscan, based at Oxford University.]
1254
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Opus Maius (major works)
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I.10
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p.543
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16745
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No one even knows the nature and properties of a fly - why it has that colour, or so many feet
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