Image: Ming Dynasty eruptor proto-cannon
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Description: An illustration of an "eruptor," a proto-cannon, from the 14th century Ming Dynasty book Huolongjing. The cannon was capable of firing proto-shells, cast-iron bombs filled with gunpowder.
Title: Ming Dynasty eruptor proto-cannon
Credit: Huolongjing, from Science and Civilisation in China p.266
Author: Jiao Yu and Liu Ji
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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