ANILINE BLACK. 6 4 g

Wash, and second dung twenty-five minutes at 130° F.

Water.100 gals.

Sulphate of soda. 2 lbs.

Phosphate of soda . 1 oz.

Solid cow-dung. 4 quarts.

Wash, and dye with 13 lbs. madder per piece. Wash, pass through chlorideof lime at i° Tw., then through steam-chest, and wash. Dry, and steam forthirty minutes at 2 lbs. pressure. Wet, soap-wash, and pass through weaksours (1 part of oil of vitriol, at 170° Tw.) to 1000 water, at 6o° F.) for sixminutes. Wash, and pass through chloride of lime as before. Wash, dry,and raise orange in the usual way—first in bichrome alone, and then inbichrome and lime at 212 0 F. Wash well, and pass through chloride of limeas before. Wash and dry.

Paraf proposes the following process :—“ Instead of using chloric acidcombined with potash I combine other bases which form salts more soluble orless liable to crystallise, as soda, oxide of lead, barytes, strontian, lime, mag-nesia, or similar bases. As the chloric acid of the chlorate ought to be setfree to enable it to oxidise, it will be easily perceived that I can liberate thebase more easily from the chlorates of barytes, lead, strontian, or lime, thanfrom chlorate of potash, by means of acids forming insoluble salts with thebases herein named. I have already applied a reaction of potash to facilitatethe decomposition of chlorate of potash, and thus dispense with a great partof its defedts. Instead of decomposing by the usual acids,—as oxalic, tartaric,nitric, and similar acids,—I decompose by hydrofluosilicic acid, which gives asalt of potash nearly insoluble, sets the chloric acid free, and prevents themaking of crystals. In consequence of the greater solubility of the chlorate,and more complete setting at liberty of the chloric acid, I can put a largerquantity in contadt with the substances to be oxidised, and I obtain morecomplete oxidation for steam-colours, such as catechu and the aniline-blacks,and similar colours. I obtain good results for aniline-black by using thefollowing proportions, which I will call ‘ black liquor ’* :—1 part chloride ofaniline, 1 part hydrofluosilicic acid at 6* Tw., and 10 per cent of protochlorideof iron dissolved in the aniline and acid. To save the greys the cloth is pre-pared in a solution of chlorate of soda, at 6° Tw.; then print on the followingcolour:—2 lbs. of aniline-black liquor, 3 lbs. of water, 2 lbs. white starch,2 lbs. gum-dragon paste, 1 lb. brown British gum, 7 ozs. lamp-black. Boilwell together, and cool down. Age in a cold room for one or two days, but ifpressed for time the black can be produced in a few hours by running once ortwice through an ageing-machine. If saving the greys is no objedt the clothdoes not require any preparation, and the soluble chlorate can be given in thecolour and printed together upon the cloth. I use the following proportions :—First, 2 lbs. black liquor, 3 lbs. water, 1 lb. starch, all well boiled together;second, 6 lbs. chlorate of soda at 20° Tw., 2 lbs. starch, 2 lbs. brown gumpaste, 2 lbs. gum dragon. For the colour I use 1 part of the first mixture to1 part of the second, and mix them cold. I can add, also, to a colour con-taining a small quantity of chlorate of potash, other chlorates of greaterSolubility than chlorate of potash, and the result will in all cases be better

An ill-chosen name, since it already denotes the acetate or pyrolignite of iron.