pe sugar. Spirits.
Sugar of milk.

The most recent and exact researches have established as a universal
fact, to which nothing yet known is opposed, that the nitrogenised
constituents of vegetable food have a composition identical with
that of the constituents of the blood.

No nitrogenised compound, the composition of which differs from that
of fibrine, albumen, and caseine, is capable of supporting the vital
process in animals.

The animal organism unquestionably possesses the power of forming,
from the constituents of its blood, the substance of its membranes
and cellular tissue, of the nerves and brain, and of the organic
part of cartilages and bones. But the blood must be supplied to it
perfect in everything but its form--that is, in its chemical
composition. If this be not done, a period is rapidly put to the
formation of blood, and consequently to life.

This consideration enables us easily to explain how it happens that
the tissues yielding gelatine or chondrine, as, for example, the
gelatine of skin or of bones, are not adapted for the support of the
vital process; for their composition is different from that of
fibrine or albumen. It is obvious that this means nothing more than
that those parts of the animal organism which form the blood do not
possess the power of effecting a transformation in the arrangement
of the elements of gelatine, or of those tissues which contain it.
The gelatinous tissues, the gelatine of the bones, the membranes,
the cells and the skin suffer, in the animal body, under the
influence of oxygen and moisture, a progressive alteration; a part
of these tissues is separated, and must be restored from the blood;
but this alteration and restoration are obviously confined within
very narrow limits.

While, in the body of a starving or sick individual, the fat
disappears and the muscular tissue takes once more the form of
blood, we find that the tendons and membranes retain their natural
condition, and the limbs of the dead body their connections, which
depend on the gelatinous tissues.

On the other hand, we see that the gelatine of bones devoured by a
dog entirely disappears, while only the bone earth is found in his
excrements. The same is true of man, when fed on food rich in
gelatine, as, for example, strong soup. The gelatine is not to be
found either in the urine or in the faeces, and consequently must
have undergone a change, and must have served some purpose in the
animal