dark blue or dark green for the third.


295. TURNER'S PATENT YELLOW PAINT

When sea-salt is made into a paste with litharge, it is decomposed,
its acid unites with the litharge, and the soda is set free. Hence
Turner's patent process for decomposing sea-salt, which consists in
mixing two parts of the former with one of the latter, moistening
and leaving them together for about twenty-four hours. The product
is then washed, filtered, and evaporated, by which soda is obtained.
A white substance is now left undissolved; it is a compound of
muriatic acid and lead, which, when heated, changes its colour, and
forms Turner's yellow; a very beautiful colour, much in use among
coach-painters.


296. TO PAINT IN IMITATION OF BLACK WALNUT

Wash the surface of the wood with weak alum-water, after being well
sand-papered; then go over it with linseed oil, coloured with murat
amber and red lead. It is better to have this colour rather light,
and renew the application; when this has sufficiently dried, go over
the surface with a strong sizing of transparent glue, and then use
two castors of copal varnish. Any good grained pine will bear a very
close resemblance to walnut, and the surface will be nearly as hard.


NOTE