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Ideas: A History of Thought and Invention, from Fire to Freud, by Peter Watson

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The discovery of the incendiary/explosive capacities of coal, saltpetre and sulphur originated in alchemical circles in the Tang age but was not used in anger until 904–906.26
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Ideas: A History of Thought and Invention, from Fire to Freud
Ideas: A History of Thought and Invention, from Fire to Freud
by Peter Watson
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