"Folk medicine recognizes three kinds of sickness that may apppear in the human body. The first is referred to as energy diseases resulting from continued activity of the energy expending mechanism in the body, because the individual does not know how to release the body from such activity. In this category would come high blood pressure, heart attacks, stomach and intestinal ulcer, muscle paralyysis, hay fever, asthma, migraine headaches, diabetes mellitus, arthriitis, and cancer.

The second variety of sickness is what folk medicine calls bacteriological diseases, caused by the presence within the body of harmmful micro-organisms that grow, multiply, and destroy. They are often referred to as infectious diseases. Typhoid fever would be one of them.

The third kind is known as parasitic diseases, or those due to bites of insects and the presence within the body of parasites, like the trichinosis which develops when you eat contaminated pork conntaining the parasites of this disease. .....

......To begin with it is well known that only certain organs and tisssues control the expenditure of energy in all animals. including man. As we have enumerated before these are the brain. heart, blood, the thyroid gland, the adrenal glands, the celiac ganglia, and the symmpathetic division of the autonomic nervous system. The adrenal glands govern emergency energy. while the thyroid controls the level of constant energy. Taken together, these organs and tissues are the means whereby energy is released in this or that gland or combinaation of muscles to enable an animal or human being to secure food. to escape from danger, and to reproduce its kind....

...The brain-heart-thyroid-adrenal-sympathetic system represents the energy expending mechanism of the body, and is the distingguishing feature of man and the higher animals. It controls adaptively the muscular action, glandular secretion and emotional expression."
from Dr. Jarvis' wrtings and notes.

http://jcrows.com/arthritis.html