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2                 THE LABORATORY-
soft shades of the hair, &c. you may finish with a fine
pencil, with the black colourpon the gold; and when
you have done, let it dry thoroughly for three or four
days more; then lay over it a clear varnish, which you
may, after it is dried, repeat a second time, and your
work will look beautiful.
            To do this upon a Blue Ground.
  ArTEP you have gilded your work, then take alui
which is not too coaue, mix it with ynortar on a marble-
stone, addiag to it te white of an egg: with this and a
Ilttle water Mix your smalt, and strike it fie and evnea
oyer the gilding: then, when it is almost dry, sift thro
a fine sieve some of the fine~t smalt over it: you may, if
you will, mix it with spanaes of several colours; and
when thoroughly dry, wipe off what sticks not to it, an
proceed in tracing up your figures you design for gold.
The fine finishing strokes upon the gold, because they
cannot well be done with smalt, may be done with Prus-
sian blue or indigo iked with white lead. You may, if
you will, varnish it; but it will look better without.
                     YARIEXEES OF
GLTUES AND CEMENTS, FOR JOINING WOOD, STONE,
                 GLASS AND METALS.
 An' excellent Glue for Wood, Stone, Glass, and  ettalf.
 TAKF, good glue four ounces, soak it over night in dis-
tied vinegar, then boil it up therewith; take a clove of
garlic, beat or bray it in a mortar, and add to itone ounce
of ox-ali, Wring this juice through a linen cloh into
the w jrm Olve; then tak4 wastich and sar cIla, of ach
                                                  one