In examining a patient, the family history should be obtained; for this gives a clue to predisposing causes and family habits which lead to specific derangements. Then the patient's personal life and habits, mental and physical, must be reveiwed. This information, with analysis of the objective and subjective symptoms, leads to a knowledge of what the patient's illness is; for diseases are the result of broken health laws.

If the patient has pain, this directs to the part of the body affected. It must be determined if the pain is local or sympathetic.

A patient may be sick at the stomach, and be vomiting; yet the real derangement or cause may be of the brain or uterus. If the stomach is treated, the treatment must fail.

Spinal disease may manifest in the joints of the feet and legs. If the physician foolishly treats the pain in the legs for rheumatism, he must fail to benefit his patient. I have met with a case wherein a boy had been treated for rheumatism of the left knee, when his disease was preputial.

Palpitation of the heart comes from stomach derangement oftener than from other causes.

Pulmonary tuberculosis often presents symptoms of heart derangement; and mitral stenosis will cause much coughing, and even hemorrhage of the lungs, which symptoms are secondary to the heart derangement.