take apart and put together again in such a way that the materials may
be delivered in a shape that will enable the cells to store them. It is
then the business of the cells to utilize these materials for TISSUE
BUILDING and in the production of energy, in the form of work and heat.
The body manufactures different kinds of products, some beneficial,
others harmful. Thus for example, excessive muscular effort throws into
the bloodstream fatigue products that are poisonous. A person utterly
tired out is really suffering from acute poisoning. On the other hand,
to resist invasion by infectious diseases, the body manufactures
anti-poisons that kill the enemy germs--making in other words, its own
medicine."

The physical processes here mentioned by Dr. Rucker are fully explained
in my book, "Dare to be Healthy," chapter VI, VII, VIII, and the natural
principles involved have been practiced by me for over 30 years. I
mention the fact simply as corroborative evidence of the authenticity
and value of the work shortly to be published.

"Art may err, but Nature cannot miss,"--is an aphorism attributed to
the poet Dryden. It adequately supports Dr. Rucker's wise, significant
and timely pronouncement and reminds me of an illustrative incident
recorded in connection with the world famed physician Boerhaave of
Leyden,--Holland's chief centre of learning--who lived some 250 years
ago, when doctors knew less than at present of the circulation and
functions of the blood.

Boerhaave, it appears, conceived the idea of a sort of posthumous
pleasantry, of a distinctly lucrative nature, at the expense of his
medical brethren. Professional ignorance and popular superstition had
alike surrounded his name with a halo of mystery and he was credited