few drops of nitric
acid, the albumen, which is invariably present in Bright's disease of
the kidneys, is coagulated. By the employment of other re-agents we may
determine the presence of sugar--a characteristic of diabetic urine. And
thus we might mention almost innumerable chemical tests by which the
several changed conditions of the urine, _characteristic_ of different
diseases, may be ascertained with _absolute certainty_.

THE MOST EMINENT MEDICAL AUTHORITIES ENDORSE IT.

Dr. Eberle, a distinguished allopathic author, thus writes: "Whatever
may be the disease, the urine seldom fails in furnishing us with a clue
to the principles upon which it is to be treated."

Dr. Braithwaite also says: "We can arrive at a more accurate knowledge
respecting the nature of diseases from examining the urine than from any
other symptom."

Golding Bird, whose writings are regarded as sound and practical by the
most learned of the medical profession, says: "The examination of the
urine in disease is now regarded as one of the most important aids in
diagnosis, and which it would be injurious alike to the welfare of the
patient and the credit of the practitioner to avoid."

[Illustration: Fig. 9.]

The eminent Dr. F. Simon writes as follows: "From the physical and
chemical state of the urine, the attentive and observing physician may
obtain a great quantity of information for ascertaining and establishing
a diagnosis. More than all other signs, the correct examination of the
sediment is of importance to the physician. * * * For the medical man it
is the compass which guides him in the unlimited chaos of disease and
its treatment; for the patient it is the thermometer of his condition,
the premonitory indication of the decrease or aggravation of his malady;
and for the healthy man it is the regulator of his diet and his life.
Every one is aware of the variations of the barometer, and we know that
the fluctuations of the column of mercury are closely associated with
the variable conditions of the atmosphere; so, to the practical
observer, variations of the urine, as well as the elements composing it,
point out with certainty the changes in health, and the condition of the
organs."

While we recognize the importance of examining the urine as an aid in
distinguishing diseases, and have made this old German method of
diagnosis a special study, yet we do not claim that _all_ diseases can
be unmistakably distinguished by such examinat