plied
with a fine brush. The coating is not dull, and may be highly burnished.

Another process consists in first applying a coat of copal or other
varnish, and when this has become of a tacky dryness, dusting bronze
powder over it. After remaining a few hours, this bronzed surface should
be burnished with an agate or steel burnisher.

TO MAKE DRAWING-PAPER TRANSPARENT.

Drawing paper of any thickness may be made perfectly transparent by
damping it with benzine. India ink and water colors can be used on this
paper. The paper resumes its opacity as the benzine evaporates, so that
any place that has not been duly traced requires to be redamped with the
benzine for that purpose. A sponge should be used for the application.

TO MAKE PAPER WATER-PROOF.

The following is a recipe for making paper water-proof:--Add a little
acetic acid to a weak solution of carpenters' glue. Dissolve also a small
quantity of bichromate of potash in distilled water, and mix both
solutions together. The sheets of paper are drawn separately through the
solution, and hung up to dry.

HOW TO SIZE POOR DRAWING PAPER.

To size poor drawing paper, take one oz. of white glue, one oz. of white
soap, and one-half oz. of alum. Soak the glue and soap in water until they
appear like jelly, then simmer in one quart of water until the whole is
melted. Add the alum, simmer again and filter. To be applied hot.

TO PREVENT ALTERATIONS IN WRITING.

The following process of preparing paper will prevent alterations in
writing:--Add to the sizing 5 per cent of cyanide of potassium and
sulphide of antimony, and run the sized paper through a thin solution of
sulphate of manganese or copper. Any writing on this paper with ink made
from nutgalls and sulphate of iron, can neither be removed with acids nor
erased mechanically. Any acid will change immediately the writing from
black to blue or red. Any alkali will change the paper to brown. Any
erasure will remove the layer of color, and the white ground of the paper
will be exposed, since the color of the paper is only fixed to the outside
of the paper without penetrating it.

TO PREVENT GUMMED PAPER FROM COCKLING.

It is well known that paper, when gummed, often cockles. To remedy this a
little glycerine or sugar should be added to the gum.

COPYING DRAWING IN COLOR.

The paper on which the copy is to appear is first dipped in a bath
consisting of thirty parts of white soap, thirty parts of alu