Rockets.
There are several recipes for making rockets, the best of which is 3 ounces of charcoal, 6 of sulphur, 8 of niter, 32 of meal powder. Another very good one is, 3 ounces of iron filings, 4 of powdered charcoal, 8 of sulphur, 16 of niter, and 64 of meal powder. If a smaller quantity is wanted divide each proportion by 2, if a still smaller divide by 4.