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Gunpowder and Ammunition, Their Origin and Progress

Note 564 — Chapter XIII · SHOCK PROJECTILES

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“Instrumenta naviganda possunt fieri sine hominibus remigantibus, ut naves maximæ, fluviales et marinæ, ferantur unico homine regente, majori velocitate quam si plenæ essent hominibus.... Item possunt fieri instrumenta volandi.”—De Secretis, c. iv.

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