ooth surface,
and is then ready for graining. The fibril veins are produced by passing
a graining tool with a slight vibratory motion, so as to effect the
natural-looking streaks, using the black stain. A coat of the bichromate
of potash solution referred to on page 4 will make wildly-figured
mahogany have the appearance of rosewood.

=Imitation Walnut.=--A mixture of two parts of brown umber and one part
of sulphuric acid, with spirits of wine or methylated spirits added
until it is sufficiently fluid, will serve for white wood. Showy
elm-wood, after being delicately darkened with the bichromate solution
No. 1, page 4, will pass for walnut; it is usually applied on the cheap
loo-table pillars, which are made of elm-wood. Equal portions of the
bichromate and carbonate solutions (see page 4), used upon American
pine, will have a very good effect.

Another method for imitating walnut is as follows: One part (by weight)
of walnut-shell extract is dissolved in six parts of soft-water, and
slowly heated to boiling until the solution is complete. The surface to
be stained is cleaned and dried, and the solution applied once or twice;
when half-dry, the whole is gone over again with one part of chromate of
potash boiled in five parts of water. It is then dried, rubbed down, and
polished in the ordinary way.

The extract of walnut-shells and chromate of potash are procurable at
any large druggist's establishment. A dark-brown is the result of the
action of copper salts on the yellow prussiate of potash; the sulphate
of copper in soft woods gives a pretty reddish-brown colour, in streaks
and shades, and becomes very rich after polishing or varnishing.
Different solutions penetrate with different degrees of facility. In
applying, for instance, acetate of copper and prussiate of potash to
larch, the sap-wood is coloured most when the acetate is introduced
first; but when the prussiate is first introduced, the heart-wood is the
most deeply coloured. Pyrolignite of iron causes a dark-grey colour in
beech, from the action and tannin in the wood on the oxide of iron;
while in larch it merely darkens the natural colour. Most of the tints,
especially those caused by the prussiates of iron and copper, are
improved by the exposure to light, and the richest colours are produced
when the process is carried out rapidly.

=Imitation Ebony.=--Take half a gallon of strong vinegar, one pound of
extract of logwood, a quarter of a pound of