Image: Self-tripped trespass land mine, Huolongjing
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Description: The 'self-tripped trespass land mine' from the Chinese military compendium of the Fire Drake Manual (Huolongjing), written by Jiao Yu and Liu Ji in the mid 14th century.
Title: Self-tripped trespass land mine, Huolongjing
Credit: Page 195 of Joseph Needham's Science and Civilization in China: Volume 5, Part 7, Military Technology; the Gunpowder Epic (1986, Taipei: Caves Books Ltd.)
Author: Jiao Yu and Liu Ji
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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