gwood.

1421. Bone and Ivory. _Yellow._

i. Impregnate with nitro-hydrochlorate of tin, and then digest with
heat in a strained decoction of fustic.

ii. Steep for twenty-four hours in a strong solution of the neutral
chromate of potash, and then plunge for some time in a boiling
solution of acetate of lead.

iii. Boil the articles in a solution of alum--a pound to half a
gallon--and then immerse for half an hour in the following
mixture:--Take half a pound of turmeric, and a quarter of a pound of
pearl-ash; boil in a gallon of water. When taken from this, the bone
must be again dipped in the alum solution.

[AVOID YOURSELF WHAT YOU THINK WRONG IN YOUR NEIGHBOUR.]

1422. Horn.

Horn must be treated in the same manner as bone and ivory for the
various colours given under that heading.

1423. Imitation of Tortoiseshell.

First steam and then press the horn into proper shapes, and afterwards
lay the following mixture on with a small brush, in imitation of the
mottle of tortoiseshell:--Take equal parts of quicklime and litharge,
and mix with strong soap-lees; let this remain until it is thoroughly
dry, brush off, and repeat two or three times, if necessary. Such
parts as are required to be of a reddish brown should be covered with
a mixture of whiting and the stain.

1424. Iron. _Black, for ships' guns, shots, &c._

To one gallon of vinegar add a quarter of a pound of iron rust, let it
stand for a week; then add a pound of dry lampblack, and
three-quarters of a pound of copperas; stir it up at intervals for a
couple of days. Lay five or six coats on the gun, &c., with a sponge,
allowing it to dry well between each. Polish with linseed oil and soft
woollen rag, and it will look like ebony.

1425. Paper and Parchment._Blue._

i. Stain the material green with the verdigris stain given in No.
1433, and brush over with a solution of pearlash--two ounces to the
pint--till it becomes blue.

ii. Use the blue stain for wood.

1426. Paper and Parchment. _Green_ and _Red._

The same as for wood.

1427. Paper and Parchment. _Orange._

Brush over with a tincture of turmeric, formed by infusing an ounce of
the root in a pint of spirit of wine; let this dry, and give another
coat of pearlash solution, made by dissolving two ounces of the salt
in a quart of water.

1428. Paper and Parchm