little, provided he accomplishes that
object."--Dr. D. A. Sargent, Director of the Hemenway Gymnasium at Harvard
University.

[15] "It is _health_ rather than _strength_ that is the great requirement
of modern men at modern occupations; it is not the power to travel great
distances, carry great burdens, lift great weights, or overcome great
material obstructions; it is simply that condition of body, and that
amount of vital capacity, which shall enable each man in his place to
pursue his calling, and work on in his working life, with the greatest
amount of comfort to himself and usefulness to his fellowmen."--Maclaren's
_Physical Education_.

[16] To this classification may be added what are called albuminoids, a
group of bodies resembling proteids, but having in some respects a
different nutritive value. Gelatine, such as is found in soups or table
gelatine is a familiar example of the albuminoids. They are not found to
any important extent in our raw foods, and do not therefore usually appear
in the analyses of the composition of foods. The albuminoids closely
resemble the proteids, but cannot be used like them to build up
protoplasm.

[17] The amount of water in various tissues of the body is given by the
following table in parts of 1000:

Solids. Liquids.
Enamel, 2 Blood, 791
Dentine, 100 Bile, 864
Bone, 486 Blood plasma, 901
Fat, 299 Chyle, 928
Cartilage, 550 Lymph, 958
Liver, 693 Serum, 959
Skin, 720 Gastric juice, 973
Brain, 750 Tears, 982
Muscle, 757 Saliva, 995
Spleen, 758 Sweat, 995
Kidney, 827
Vitreous humor, 987

[18] The work of some kinds of moulds may be apparent to the eye, as in
the growths that form on old leather and stale bread and cheese. That of
others goes on unseen, as when acids are formed in stewed fruits.
Concerning the work of the different kinds of moulds. Troussart says:
"_Mucor mucedo_ devours our preserves; _Ascophora mucedo_ turns our bread
mouldy; _Molinia_ is nourished at the expense of our fruits; _Mucor
herbarium_ destroys the herbarium of the botanist; and _Choetonium
chartatum_ develops itself on paper, on the insides of books and on their
bindings, when they come in contact with a damp wall."--