"It is well known that some poisons are thrown off by the kidneys, some by the lungs, while others again are attacked by all the emunctories. The difference in the power of the system to absorb different substances, appropriate whatever can be utilized, and throw off whatever can not be used, is sometimes called idiosyncrasy, but more properly it may be called vital resistance, and upon the integrity of this power rests the ability to combat disease in all its forms, whether it be the absorption of any animal virus or the poison resulting from undigested food. This ability is in proportion to the integrity and soundness of every tissue and organ of the body. This may be illustrated by the fact that with a person suffering from kidney disease, which necessarily impedes elimination, the ordinary effects of a poison are intensified; therefore whatever aids in the promotion of good health, or in other words, the normal action of all the functions, will contribute to the safety of the individual in any and every emergency.
"When a person dies from the effect of poisoning, it is simply because the system was unable to eliminate the offending substance and was exhausted in the effort. There is a tolerance of some substances which frequently results in chronic disease, and again it is shown in what is called the cumulative effect or acute disease.
"Those who would hold that a substance is at one time a medicament, and at another time a poison, have much trouble in drawing the line between the beneficial and the poisonous effect. The idea that poisonous substances act on the system is responsible for many grave mistakes, whereas always, and under all circumstances, it is the system that does all the action.
"There might be some excuse for the idea that disease is an entity, from the facts that have been brought to light by the germ theory, but this theory is of recent date, while the entity theory is as old as superstition.
"Snake poison, which may be cited as a type of other animal