Manganese bronze, buff and green; all metallic colours

—Pad-on the manganese solution, and dry; apply the ace to-sulphate of iron, of spec. grav. 1·02, and Scheele’s green (both properly thickened), by the two-colour machine. The goods are next to be dried, and padded through a cold caustic lye of spec. grav. 1·086. They are then rinsed, and pa ed through a weak solution of chloride of lime, to raise the bronze, again rinsed, and pa ed through a solution of arsenious acid to raise the green. Scheele’s green for the calico-printer is made as follows :— Take 1 gallon of water, in which di olve with heat, 5 pounds of sulphate of copper, and 1 pound of verdigris. When the two salts are di olved, remove the kettle from the fire, and put into it 1 quart of solution of nitrate of copper, and 5 pounds of acetate of lead. Stir the mixture to facilitate the decomposition, and allow the pigment to subside. It must be thickened with 2 1 ⁄ 2 libs. of gum per gallon, for pencilling; or 12 oz. of starch for the block. The goods printed with this paste are to be winced through a caustic lye, till a fine sky-blue be produced; then washed well and rinsed. They are now to be pa ed through water, containing from half an ounce to an ounce of white arsenic per piece; 4 turns are sufficient; if it be too long immersed, it will take a yellow tint. Catechu has been considerably employed by calico-printers of late years, as it affords a fine permanent substantive brown, of the shade called carmelite by the French. The following formula will exemplify its mode of application :— Take 1 gallon of water; 1 pound of catechu in fine powder; reduce by boiling to half a gallon, pa the decoction through a fine sieve, and di olve in it 4 ounces of verdigris; allow it then to cool, and thicken the solution with 5 ounces of starch; while the paste is hot, di olve in it 5 ounces of pulverized muriate of ammonia. Print-on this paste, dry, and wash. It is a fast colour. I shall subjoin the prescriptions for two fancy cochineal printing colours.