The literature on what to eat and not to eat, what to do and not to do, on medicines that convert human stomachs into drug-stores, is simply boundless. If we believe all we read, we must consider the location we are in before we can safely draw the breath of life; we must not cool our parched throats without the certificate of the microscope. We must not eat without an ultimate analysis of each item of the bill of fare, as we would take an account of stock before ordering fresh goods; and this without ever knowing how much lime we need for the bones, iron for the blood, phosphorus for the brain, or nitrogen for the muscles. In short, there is death in the air we breathe, death in the food we eat, death in the water we drink, until, verily, we seem to walk our ways of life in the very valley and shadow of death, ever subject to the attack of hobgoblins of disease. How many lives would go down in despair but for the miracles of cure promised in the public prints, even in our best journals and monthlies, we cannot know. It is the hope for better things that sustains our lives; suicide never occurs until all hope has departed. Even our medical journals are heavily padded with pages of new remedies whose use involves the most amazing credulity. Perhaps it is well, in the absence of a sound physiological hygiene, that the people who are sick and afflicted shall be buoyed up by fresh, printed promises. Perhaps it is also well for the physician to be able to go into the rooms of the sick inspired from the advertising pages of his favorite medical journals. Are they not new stars of hope to both physician and the people? Why should we not hope when new remedies are multiplying in such infinite excess over newly discovered diseases? _New diseases?_ What is there essentially new that can be treated with remedies, in the coated tongues, foul mouths, high temperature and pulse, pain, discomfort, and acute aversion to food, that is to be found in the rooms of the sick? Are there really specifics for these conditions? The hygiene to be unfolded in these pages is so new, so revolutionary, that its first impress has never failed to excite every form of opposition known to language, and yet its practicality is so great that it is rarely questioned by those who fairly test it. It has not been found wanting in its physiology, nor has it failed to grow wherever it has found lodgement. The origin and development of this new way in health culture seem to require something of professional autobiography, that it may be seen that it is a matter of evolution and not of chance, not a fad that has only its passing hour.