COLOURED FLAMES.

Crimson :—Chlorate of potash, 30; carbonate of strontia (calcium), 12; sulphur, 8. Another for Demon Torches:—Add as much powdered chloride of calcium to an ounce of spirit of salt as will make a mixture like thick mortar, lay a gridiron over a slow fire, and on it place the cup containing this compound; let it boil two hours or more till nearly dry. Note.—The fumes are noxious. After letting it cool, add four to five ounces of pyroxylic spirit, and pour all into a white bottle for use. Use but little of the sediment, which will settle down. For use, wind common cotton wick round a nail into a ball of two inches diameter, and fix on a torch, or where needed. Pour on as much as the cotton will drink in without waste. Light with a bit of lighted paper.

Green :—Boracic acid, 5; chlorate of potash, 35; sulphur, 8.

Greenish Blue:—Shake up in a phial, in a table-spoonful of spirit of wine, two or three pinches of sulphate of copper (nitrate or chloride will answer also) ; wind some wick on a rod or wire, and ignite.

Orange :—Chalk, 16 ; chlorate of potash, 26 ; sulphur, 7.

Purple :—Chalk, 12; chlorate of potash, 30 ; sulphur, 8.

Yellow:—Chlorate of potash, 30; dried soda, 12; sulphur, 8.

Pale Yellow :—Same as for greenish blue, with the addition of a teaspoonful of common table salt.

Variations in the proportions of the substances will cause different shades. Observe that the materials must be powdered separately in a mortar, be perfectly dry, and be mixed with the hand. Make only enough for one performance, as they will not keep, from their liability to spontaneous combustion.

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