Explosion of the Grenelle gunpowder factory
Explosion of the Grenelle gunpowder factory August 31, 1794
https://www.aria.developpement-durable.gouv.fr/wp-content/files_mf/A5692_ips05692_002.pdf
Also
https://publicacions.iec.cat/repository/pdf/00000261/00000015.pdf
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French powder doesn't seem to be quite so bad after all.