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<p>[QUOTE=&quot;ksparrow, post: 2050165, member: 7638&quot;]Reminds me of high school.&nbsp; In the chem lab closet were some ancient jars and bottles.&nbsp; One of them, picric acid, had crystallized out.&nbsp; That stuff was one of the main explosives used in WW1 in artillery shells and crystalline is about as sensitive to a bump as nitroglycerine.[/QUOTE]</p><p><br /></p>

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