A hygiene that claims to be new and of the greatest practicality, and certainly revolutionary in its application, would seem to require something of its origin and development to excite the interest of the intelligent reader. Methods in health culture are about as numerous as the individuals who find some method necessary for the health: taking something, doing something for the health is the burden of lives almost innumerable. Very few people are so well that some improvement is not desirable. 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.