No substance combines better with salts of copper, than sugar. Sugar, put into the bowl of a tobacco pipe, and placed in the fire, burns fiercely, and is converted into caramel. This, poured on to a plate, slightly smeared with butter, to prevent its sticking, hardens on cooling; and is used for colouring brandy, vinegar, gravy, porter, coffee, &c. Stearine must be scraped very fine from a composite candle. BLUE STARS AND LANCES WITHOUT SUGAR. Number Chlorate of Potash...... 5 40 1840 6 84840 24 16 30 24 82240 616 24 2 540 40 Calomel .... 420 828 2 21212 6 8 10 8 1 820 3 1 8 Sulphuret of Copper 4 20 10 28 Shellac ... Oxychloride of Copper.. Dextrine Sulphur Black Oxide of Copper.. Copper-filings SalAmmoniac 3 2 + 2 2 I 896 510 4 I 2 3 2 3 5 II 2 2 3 I 25 5 5 T CRIMSON AND SCARLET STARS AND LANCES. Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Chlorate of Potash... 16 8 16 16 24 16 5 16 81625 432 6 16 28 32 2696 824 8 Nitrate of Strontian 16 16 32 32 -16 424 5 6 30 748 5 T -42 10 721218 12 71 4 3 112 I 14 2 2 9 212 5 I II 3 I - I It is impossible to powder shellac sufficiently fine, by hand; and, twenty years ago, it could not be procured. About that time the drug-grinders, finding a demand for it, submitted it to the action of the stamping mills, (mechanical pestle and mortar), and now it can be obtained at most shops. Chertier mixed it with salt; melted the two together; powdered the mixture; and washed out the salt. Such process is needless now. It is useless, unless as fine as wheaten flour. Page, of 47, Blackfriars Road; and Chubb, of 29, Old Street, St. Lukes, London, supply it. If powdered nitrate of barytes, and shellac crushed by being hammered in a bag, are mixed together, and melted in a pipkin, over the fire, the mixture, when cold, may be reduced to a powder in an iron mortar, with patience. Take Number 6. Weigh out 21 parts nitrate of barytes, and 2 parts of coarsely powdered lac; melt them together; when cold, powder them; and add the other substances in proper proportion. Shellac may be melted with nitrate of strontian, in the same way. |