All law is good, though it may not always seem so to us, and law is for the breaker of the law, not the doer.

The law of momentum is good, so is the law of resistance, but once let these laws conflict and there is a collision, yet neither phase of the law is to blame for this.

We recognize the working of the law of momentum when we see the train hurtling along the tracks at terrific speed, and so long as the law of resistance does not interfere all goes well, but when we look forward and see on the track an immense rock, that is expressing the law of resistance, then we know there will be a collision of these two mighty forces.

Yet the law is good in its every tenet, and all that is wrong is that this resistance rolled down on the track at the wrong time.

There is but one way for us to keep as well as we should be at all times, and that is by a recognition of the law and by obedience to its demands, and when we have done this there is no harm that we can do to ourselves.

Certain drugs are violent poisons, and if we take into our bodies one of these we know the result will be destruction for us, so to avoid collision with this law we refrain from the taking of this drug.

Now food, in order to replenish the body, must be food, so in selecting food make sure first that it is really food.

Never forget that food is replenishment material for the body itself or for its stored fuels, and this only.

So the law must be applied and our deficiencies made good each day, if we would avoid bankruptcy.

Having decided that the things we have selected are food, not merely a manufactured taste of some kind, then we are under the further obligation to see to it that we do not create in taking these foods together any adverse chemical action, as by eating at the same time two foods of diametrically opposite digestive requirements, which will be referred to again.

We must avoid eating too much of even the right foods, as we must be sure to take enough for our needs daily.

We must chew our food thoroughly in order to allow the law of digestion to work, for as each division of the tract has some definite action to perform on every particle of food that enters the digestive tract, we must allow the saliva time to perform its share of this.

If the law says that plants thoroughly fertilized, therefore more robust and resistant, will resist the attacks of parasites, have we any grounds for a belief that the body also will not be subject to the very same law?

We do know that not everybody is equally susceptible to germ invasions, and may not this be the reason?

Dr. Percy R. Howe, of Boston University, a man who has done most fundamental work in nutrition on monkeys, says that for every known deficiency in feeding of the monkeys he can predict with absolute certainty what deficiency condition will show up.

He also, says that where it sometimes takes many weeks for these deficiencies to show, after the beginning of the deficient feeding, yet this same deficiency can be completely cleared up in a very few days after the food deficiency is restored.

Here the law works so distinctly that he can recognize the deficiency as always of the same character from withholding the same necessary chemical.

Dr. Elmer V. McCollum, of Johns Hopkins University, Baltimore, has taken sixteen different groups of small laboratory animals and allowed each different group to represent one of the sixteen body chemicals or salts, each group a different chemical, and by withholding from the first group lime, the second group iron, the third group potassium, the fourth sodium, and so on through the entire sixteen groups, he could predict the sort of deficiency that would develop in each group. The law, working out in body nutrition; and can we dodge it? Our misunderstanding of the law has gotten us into serious trouble individually and as a nation, and it is high time that we wake up and learn what has all this time been at the bottom of our starvation in the midst of plenty.

The law of compensation shows again in the subject of work or exercise and rest.

We cannot work all the time, nor can we rest all the time, if we would be well.

The pendulum swings this way so far, it then swings the other way just as far, and thus it keeps on moving.

We work so long, so hard, accomplish so much, and then we have to rest, else we would bankrupt our energies entirely.

It is when we sleep that we re-energize ourselves, when we recharge our run down batteries, when we oxidize and build up into the body the various replenishment materials taken in through the day.

Even our constantly working heart has two-fifths of its cycle devoted to rest.

Respiration is active only during inspiration, the following expiration being a period of rest, when the resiliency and weight of the chest assists expiration without muscular effort.

So every part rests at times, else it could not go on.

Nature seems to have divided man's day most conveniently into thirds: one-third for work, one-third for recreation or amusement or pleasure, and one-third for rest and sleep.

Maybe Nature did not do this, but at any rate man has grown into about this division of his day, and it represents a very good balance usually for the average man.

While we sleep we inspire, respire, twice as much air per minute as when awake, as you will easily note by watching the deep breathing of the sleeper.

Twice as much oxygen enters the lungs during these eight hours as during the eight hours of recreation, unless this be composed largely of exercise, or if one is quiet, or engaged at sedentary occupation, and if he takes little exercise, then he uses as much oxygen while sleeping as during the sixteen waking hours.

This fact should emphasize the importance of fresh air in the sleeping quarters.

It is during sleep that all of the oxidation processes are carried on at an advanced rate, as the activities of the day are over and there is nothing to do but to work over the materials taken in during the day, building the broken defenses of the tissues and elaborating into fuels those substances whose whole function is this one thing of supplying material for oxidation when needed.