Nine parts of well-dried and finely powdered chlorate of potash, mixed with three parts of finely powdered galls, will make a highly explosive compound. Do not mix it in a mortar, as it would explode, but by means of passing through a brass sieve. The strength of common gunpowder may be increased by working up with the powdered meal about 12 per cent. of powdered galls, and regranulating it.
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