and in our work these are chiefly of
plaster. They are divided into two classes known as piece and waste
molds. As the names indicate the latter is wasted or destroyed after
making one copy while the piece variety can be used for a number of
reproductions. The piece mold is divided into sections in such a way as
will allow its removal without injury to either mold or cast. The waste
mold is made from soft or fleshy objects which can be drawn from it in
spite of projections known as undercuts.

As an illustration let us procure a cast of a deer's nose for reference
in mounting the head later. For our purpose we wish a cast of the nose
and lips, so with the head in the flesh at hand, the hair as far back as
the corner of the mouth is coated with clay water to prevent the liquid
plaster from penetrating and adhering. This done the head is propped up
on the table and a rough box arranged around it, which will reach nearly
to the mouth as the head is placed with nose uppermost. Pour sand in
this box until only as much of the nose projects as is desired to cast.

Now mix in a bowl or basin a sufficient amount of water and plaster of
paris to cover the surface of the deer's nose about 1/4 inch thick. This
should be of the consistency of cream and enough bluing or lampblack
should be added to give it a decided tint.

If the skin of the lips and nose is disposed naturally the plaster may
be ladled on with the spoon, endeavoring to get about an even coating.
Wash any remaining bits from the dish and mix say twice the amount of
plaster without coloring. Distribute this over the other and allow to
harden, which they will do in about 20 minutes. A little careful work
will withdraw this mold from the nose and it may either be laid aside or
used at once in making the cast.

To do this brush the inside with clay water and pour it full of plaster.
Shake well to prevent bubbles and when hardened chisel away the mold. In
doing this lay it on the lap or a cushion and chip off the mold. When
the first layer (the colored one) appears work with caution to avoid
marring the cast.

If a wire loop was inserted before the plaster hardened the cast may be
hung on the wall for future reference.

[Illustration: THREE PIECE MOULD OF HEAD.]

The preparation of a piece mold is somewhat different. A mold can be
made in two pieces of a round object like a ball and if each piece is
exactly one-half, it will draw, because there is no point under wh