In the one case death ensues from an overplus of unappropriated fluids of nutrition, in the other there is no appropriation to sustain animal life and the patient dies from starvation. The same law holds good in the parts as well as in the whole body. CHAPTER XI. FEVERS. Be Armed With Facts--Union of Human Gases With Oxygen--Fever and Nettle-rash. Nature Constructs for a Wise Purpose--Processes of Life Must be Kept in Motion--No Satisfaction from Authors--Animal Heat--Semeiology--Symptomatology--Definition of Fever--Fevers only Effects--Result of Stoppages of Vein or Artery--Aneurisms. BE ARMED WITH FACTS. When we reason for causes we must begin with facts, and hold them constantly in line for action, and use, all the time. It would be good advice never to enter a contest without your saber is of the purest steel of reason. By such only can you cut your way to the magazine of truth. As we line up to learn something of the cause of fever, we are met by heat, a living fact. Does that put the machinery of your mind in motion? If not, what will arouse your mental energy? You see that heat is not like cold. It is not a horse with eyes, head, neck, body, limbs and tail; but it is as much of a being as the horse; it is a being of heat. If cause made the horse, and cause made the heat, why not devote all energy in seeking for cause in all disturbances of life? UNION OF HUMAN GASES WITH OXYGEN. Who says heat is not a union of the human gases with oxygen and other substances as they pass out of the excretory system. By what force do parts of the engine of life move? If by the motor power of electricity, how fast must the heart or life current run to ignite the gasolene of the body and set a person on fire and burn to fever heat? If we know anything of the laws of electricity, we must know velocity modulates its temperature. Thus heat and cold are the effect. If we understand anatomy as we should, we know man is the greatest engine ever produced, complete in form, an electro-magnet, a motor, and would be incomplete if it could not burn its own gases. When man, is said to have fever, he is only on "fire," to burn out the deadly gases, which a perverted, dirty, abnormal, laboratory, has allowed to accumulate by friction of the journals of his body, or in the supply of vital fluids. We are only complete when normal in all parts,--a true compass points to the normal only. When reasoning on the fever subject would it not be strictly in line to suppose that the lowest perceptible grade of fever requires a less additional physical energy to remove some foreign body from the person, that at first would naturally show a very light effect upon the human system, which would be the effect of itchy sensation. FEVER AND NETTLE-RASH.