IV.—Boil together, with constant {342} stirring, the following ingredients until a homogeneous mass results:
| Linseed oil | 77 parts |
| Litharge | 10 parts |
| Sugar of lead | 2 parts |
| Lampblack | 4 parts |
| Oil turpentine | 2 parts |
| Umber | 0.4 parts |
| Japanese wax | 0.3 parts |
| Soap powder | 1.2 parts |
| Manila copal | 0.7 parts |
| Caoutchouc varnish | 2 parts |
V.—For Light Woven Fabrics.—Ammonium sulphate, 8 parts, by weight; ammonium carbonate, 2.5 parts; borax, 2; boracic acid, 3; starch, 2; or dextrin, 0.4, or gelatin, 0.4; water, 100. The fabric is to be saturated with the mixture, previously heated to 86° F., and dried; it can then be calendered in the ordinary way. The cost is only 2 or 3 cents for 16 yards or more of material.
VI.—For Rope and Straw Matting.—Ammonium chloride (sal ammoniac), 15 parts, by weight; boracic acid, 6 parts; borax, 3; water, 100. The articles are to be left in the solution, heated to 212° F. for about 3 hours, then squeezed out and dried. The mixture costs about 5 cents a quart.
VII.—For Clothing.—The following starch is recommended: Sodium tungstate, perfectly neutral, 30 parts; borax, 20; wheat or rice starch, 60. The constituents are to be finely pulverized, sharply dried, and mixed, and the starch used like any other. Articles stiffened with it, if set on fire, will not burst into flame, but only smolder.
VIII.—For Tents.—
| Water | 100 parts by weight |
| Ammonium sulphate, chemically pure | 14 parts by weight |
| Boracic acid | 1 parts by weight |
| Hartshorn salt | 1 parts by weight |
| Borax | 3 parts by weight |
| Glue water | 2 parts by weight |
Boil the water, put ammonium sulphate into a vat, pour a part of the boiling water on and then add the remaining materials in rotation. Next follow the rest of the hot water. The vat should be kept covered until the solution is complete.
IX.—For Stage Decorations.—Much recommended and used as a fireproofing composition is a cheap mixture of borax, bitter salt, and water; likewise for canvas a mixture of ammonium sulphate, gypsum, and water. Ammonium sulphate and sodium tungstate are also named for impregnating the canvas before painting.
X.—For Mosquito Netting.—Immerse in a 20 per cent solution of ammonium sulphate. One pound of netting will require from 20 to 24 ounces of the solution to thoroughly saturate. After withdrawing from the bath, do not wring it out, but spread it over a pole or some such object, and let it get about half dry, then iron it out with a hot iron. The material (ammonium sulphate) is inoffensive.