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Chinese Fire for Sky Rockets
If inch or under, nitre, 16 parts; charcoal, 4 parts; sulphur, 8 parts; cast-iron borings, 4 parts. Mix. Or: If over 1 inch and under 2 inches bore, nitre 16 parts; charcoal, 4 parts; sulphur, 4 parts; iron borings, 5 parts. Mix.