ld.

(2) Veal, from the calf. It should be at least
six weeks old.

(3) Mutton, from the sheep. Spring lamb is from
six to eight weeks old; yearling is one year
old.

(4) Pork, from the pig.

(5) Fowl, poultry--chicken, turkey, duck,
goose.

(6) Game, wild animals--deer, wild duck,
partridge, etc.

2. Parts of meat:

(1) Fat.--(_a_) Inside fat, around the internal
organs, usually called kidney fat, or suet.
(_b_) Outside fat, next the skin, called caul
fat.

(2) Bone, (3) muscle, or lean meat.

3. Composition of fat:

(1) Connective tissue, (2) true fat, (3) water.

Fat should be the first part studied, because it is the simplest tissue
and the parts are most plainly seen. Pick the specimen apart, and the
tissue that holds it together is found. Its name is easily developed
from its use.

The water may be shown by heating pieces of fat in a small saucepan and,
when it becomes hot, covering the dish with a cold plate. Remove the
plate before it gets heated, and moisture will be condensed on its
surface. The presence of water in fat may also be reasoned out by
remembering that water enters into the composition of all body tissues.

4. Composition of bone:

(1) Mineral matter (lime), (2) connective
tissue, (3) water.

Neither the mineral substance nor the connective tissue in bone can be
seen until either one or the other is eliminated.

Strike the fresh bone with a steel knife, and it shows the quality of
hardness. Bones are built from food, and the only food substance that is
so hard is mineral matter. Show the burned bone, with only the mineral
matter left, and let each pupil examine it. Its formation indicates the
spaces which the part burned out of it occupied. Let it fall or crush
part of it in the fingers, to show how easily it is broken. Such bones
would be no use as a framework to support the body. The bones of very
old persons get too much like this, and we are afraid to have such
people fall. The burned bone needs something to hold it together--a
connective tissue. Such a tissue was in the spaces before the bone was
burned.

Show the bone after it has been prepared in an acid solution, with only
the connective tissue left. Explain how it was prepared. Bend it to show
its pliability. To be of use in the body i