consists of iron and copper.  It obtains its name from its use for the coloration of the hair, and particularly the eyebrows—­for rastik means eyebrows, and yuzi stone.  The fine powder of this metal is as intimately mixed as possible with the moistened gall-mass into a paste, which is preserved in a damp place, by which it acquires the blackening property.  In some cases this mass is mixed with, the powder of odorous substances which are used in the seraglio as perfumes, and called harsi, that is, pleasant odor; and of these the principal ingredient is ambergris.  To blacken the hair a little of this dye is triturated in the hand or between the fingers, with which the hair or beard is well rubbed.  After a few days the hair becomes very beautifully black, and it is a real pleasure to see such fine black beards as are met with in the East among the Turks who use this black dye.  Another and important advantage in the use of this dye consists therein, that the hair remains soft, pliant, and for a long time black, when it has been once dyed with this substance.  That the coloring properties of this dye are to be chiefly ascribed to the pyrogallic acid, which can be found by treating the mass with water, may be with certainty assumed.

LITHARGE HAIR DYE.

Powdered litharge, 2 lbs. 
Quicklime, 1/2 lb. 
Calcined magnesia, 1/2 lb.

Slake the lime, using as little water as possible to make it disintegrate, then mix the whole by a sieve.

ANOTHER WAY.

Slaked lime, 3 lbs. 
White lead in powder, 2 lbs. 
Litharge, 1 lb.

Mix by sifting, bottle, and well cork.

Directions to be sold with the above.—­“Mix the powder with enough water to form a thick creamy fluid; with the aid of a small brush; completely cover the hair to be dyed with this mixture; to dye a light brown, allow it to remain on the hair four hours; dark brown, eight hours; black, twelve hours.  As the dye does not act unless it is moist, it is necessary to keep it so by wearing an oiled silk, india-rubber, or other waterproof cap.

“After the hair is dyed, the refuse must be thoroughly washed from the head with plain water; when dry, the hair must be oiled.”

SIMPLE SILVER DYE. (Otherwise “Vegetable Dye.”)

Nitrate of silver, 1 oz. 
Rose-water, 1 pint.

Before using this dye it is necessary to free the hair from grease by washing it with soda or pearlash and water.  The hair must be quite dry prior to applying the dye, which is best laid on with an old tooth-brush.  This dye does not “strike” for several hours.  It needs scarcely be observed that its effects are more rapidly produced by exposing the hair to sunshine and air.

HAIR DYE, WITH MORDANT. (Brown.)

Nitrate of silver,                              1 oz., blue bottles. 
Rose-water,                                             9 oz.    "
The mordant.—­Sulphuret of potassium,        1 oz., white bottles.
"                    Water,                               8 oz.   "

HAIR DYE, WITH MORDANT. (Black.)