Items
Date is exactly
1647
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Descartes - Les Principes 1647 (cover)
Cover page for Descartes's Les Principes of 1647 -
PP III 63-6 (1647)
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PP III 70 (1647)
vortex -
PP III 83-92 (1647)
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PP III 105-112 (1647)
vortex -
PP III 135 (1647)
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PP III 136 (1647)
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PP III 149 (1647)
planetary system -
PP III 23 (1647)
vortex -
PP III 31 (1647)
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PP III 57-9 (1647)
motion