Salt petre two ounces, flower of sulphur one ounce, camphor half an ounce, yellow-amber half an ounce, charcoal-dust, three quarters of an ounce, flower of benjamin, or assa odorata half an ounce, all powdered very fine; and mixed well together. Composition II. Salt petre twelve ounces, meal powder three ounces, frankincense one ounce, myrrh half an ounce, camphor half an ounce, charcoal three ounces, all moistened with the oil of spike. Composition III. Salt petre two ounces, sulphur half an ounce, antimony half an ounce, amber half an ounce, cedar raspings a quarter of an ounce, all mixed with the oil of roses, and a few drops of bergamot. Composition IV. Salt petre four ounces, sulphur one ounce, saw-dust of juniper half an ounce, saw-dust of cypress one ounce, camphor a quarter of an ounce, myrrh two drams, dryed rosemary a quarter of an ounce, cortex-elaterii half an ounce, all moistened a little with the oil of roses. N. B. Water rockets, may be made with any of the above compositions, with a little alteration, to make them weaker, or stronger, according to the size of the cases. Of Water Ballóóns. Having made some thin paper shells, of what diameter you please, fill some with the composition for water ballóóns, and some after this manner. Having made the vent of the shells pretty large, fill them almost full with water rockets, marrons, squibs, &c. Then put in some blowing powder, sufficient to burst the shells, and afterwards fix in the vent a water rocket, long enough to reach the bottom of the shell, and its neck to project a little out of the vent; this rocket must be open at the end, in order to fire the powder in the shell, which will burst the shell, and disperse the small rockets, &c. in the water. When you have well secured the large rocket, in the vent of the shell; take a cork float, with a hole in its middle, which fit over the head of the rocket, and fasten it to the shell: this float, must be large enough to keep the ballóón above water. Of water Squibs. Water squibs, are generally made of one ounce serpent cases, seven or eight inches long, filled two thirds with charge, and the remainder bounced; the common method of firing them, is thus: Take a water wheel, with a tin mortar in its center, which load with squibs, after the usual method, but the powder in the mortar, must be no more than will just throw the squibs out, (easily into the water), you may place the cases on the wheel, either obliquely, or horizontally; and on the top of the wheel, round the mortar, fix six cases of brilliant fire, perpendicular to the wheel; these cases, must be fired, at the beginning of the last case of the wheels and the mortar, at the conclusion of the same. To represent a sea fight with small ships, and to prepare a fire-ship for the same.