PSA: Fireworks on (around?) the 4th

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Yes, sold in Jonson Smith's catalog and comic books. Carbide pellets are put in with some water to make a gas that can go Kaboom !

I have a similar BP small black powder cannon that the barrel is about 20mm if that, you put in BP , a Waddding, and fuse in the back. Boom ; have not used it in 7 years or so
 

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