BILE is made up of water, fat, resin, sugar, cholesterine, some fatty
acids, and the salts of potash, iron, and soda.
THE BRAIN is made up of water, albumen, fat, phosphoric acid, osmazone,
and salts.
THE LIVER unites water, fat, and albumen, with phosphoric and other acids,
and lime, iron, soda, and potash.
THE LUNGS are formed of two substances: one like gelatine; another of the
nature of caseine and albumen, fibrine, cholesterine, iron, water, soda,
and various fatty and organic acids.
How these varied elements are held together, even science with all its
deep searchings has never told. No man, by whatsoever combination of
elements, has ever made a living plant, much less a living animal. No
better comparison has ever been given than that of Youmans, who makes a
table of the analogies between the human body and the steam-engine, which
I give as it stands.
ANALOGIES OF THE STEAM-ENGINE AND THE LIVING BODY.
_The Steam Engine in Action takes_:
1. Fuel: coal and wood, both combustible.
2. Water for evaporation.
3. Air for combustion.
_And Produces_:
4. A steady boiling heat of 212 deg. by quick combustion.
5. Smoke loaded with carbonic acid and watery vapor.
6. Incombustible ashes.
7. Motive force of simple alternate push and pull in the piston, which,
acting through wheels, bands, and levers, does work of endless variety.
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