INTRODUCTORY WORDS.

Health and disease are physical conditions upon which pleasure and pain,
success and failure, depend. Every _individual_ gain increases public
gain. Upon the health of its people is based the prosperity of a nation;
by it every value is increased, every joy enhanced. Life is incomplete
without the enjoyment of healthy organs and faculties, for these give
rise to the delightful sensations of existence. Health is essential to
the accomplishment of every purpose; while sickness thwarts the best
intentions and loftiest aims. We are continually deciding upon those
conditions which are either the source of joy and happiness or which
occasion pain and disease. Prudence requires that we should meet the
foes and obviate the dangers which threaten us, by turning all our
philosophy, science, and art, into practical _common sense_.

The profession of medicine is no _sinecure_; its labors are constant,
its toils unremitting, its cares unceasing. The physician is expected to
meet the grim monster, "break the jaws of death, and pluck the spoil out
of his teeth." _His_ ear is ever attentive to entreaty, and within his
faithful breast are concealed the disclosures of the suffering. Success
may elate him, as conquest flushes the victor. Honors are lavished upon
the brave soldiers who, in the struggle with the foe, have covered
themselves with glory, and returned victorious from the field of battle;
but how much more brilliant is the achievement of those who overwhelm
disease, that common enemy of mankind, whose victims are numbered by
millions! Is it meritorious in the physician to modestly veil his
discoveries, regardless of their importance? If he have light, why hide
it from the world? Truth should be made as universal and health-giving