I know a certain poet, who happens to have been well-endowed with physical graces by our mother nature. He finds it worth while to preserve them—they being accessory to those amorous experiences which form so large a part of the theme of poetry. Anyhow, this poet values his beautiful hair, and you will see him sitting in front of his fireplace, reading a book, and meanwhile his fingers run here and there over his head, and he grabs a bunch of hair and pulls and twists it. He has cultivated this habit for many years, and as a result his hair is as thick and heavy as the "fuzzy-wuzzies" of Kipling's poem. It is a favorite sport of this poet to lure some rival poet into a contest. He will mildly suggest that they take hold of each other's hair and have a tug of war. The rival poet, all unsuspecting, will accept the challenge, and my friend will proceed to haul him all over the place, to the accompaniment of howls of anguish from the victim, and howls of glee from the victor, who has, of course, a scalp as tough as a rhinoceros hide.

I am not a poet, and it is not important that I should be beautiful, and I have been too busy to remember to pull my hair; but by giving up tight hats, and by limiting the amount of my overworking, I have managed to keep what hair I had left when the hair specialist had got through with me. I tell this anecdote at the beginning of my discussion of health, because it illustrates so well the factors which appear in every case of disease, and which you must understand in seeking to remedy the trouble.

We have a phrase which has come down to us from the ancient Latins, "vis medicatrix naturae," which means the healing power of nature. So long ago men realized that it is our ancient mother who heals our wounds, and not the physician. Out of this have grown the cults of "nature cure" enthusiasts; and according to the fashion of men, they fly to extremes just as unreasonable and as dangerous as those of the "pill doctors" they are opposing. I have in mind a man who taught me probably more than any other writer on health questions, and with whom I once discussed the subject of typhoid, how it seemed to affect able-bodied men in the prime of their physical being. This, of course, was contrary to the theories of nature cure, and my friend had a simple way of meeting the argument—he refused to believe it. He insisted that, as with all other germ infections, it must be a question of bodily tone; no germ could secure lodgment in the human body unless the body's condition was reduced.

"But how can you be sure of that?" I argued. "You know that if you go into the jungle, you are not immune against the scorpion or the cobra or the tiger. There is nothing in all nature that is safe against every enemy. What possible right have you to assert that you are immune against every enemy which can attack your blood-stream?"

We shall find here, as we find nearly always, that the truth lies somewhere between the extremes of two warring schools. Our race has been existing for a long time in a certain environment, and its very existence implies superiority to that environment. The weaklings, for whom its hardships were too severe, were weeded out; hostile parasites invaded their blood-stream and conquered and devoured them. But those who survived were able to make in their blood-stream the substances known as anti-bodies, the "opsonins," to help the white blood corpuscles devour the germs. As the result of their victory, we carry those anti-bodies in our system, which gives us immunity to those particular diseases, or at any rate gives us the ability to have the diseases without dying. Every time we go into a street car, we take into our throat and lungs the germs of tuberculosis. Examination proves that we carry around with us in our mouths the germs of all the common throat and nose diseases, colds, bronchitis, tonsilitis. No matter what precautions we might take, no matter if we were to gargle our throats every few minutes, we could never get rid of such germs. And they wage continual war upon the body's defenses; they batter in vain upon the gates of our sound health. But take us to some new environment to which we are not accustomed; take us to Panama in the old days of yellow fever, or take us to Africa, and let the tsetse fly bite us, and infect us with "sleeping sickness." Here are germs to which our systems are not accustomed; and before them we are as helpless as the ancient knights-at-arms, who had conquered everything in sight, and ruled the continent of Europe for many hundreds of years, but were wiped off the earth by a chemist mixing gunpowder.

In the Marquesas Islands, in the South Seas, there lived a beautiful and happy race of savages, believed to have been descended, long ages ago, from Aryan stock. From the point of view of physical perfection, they were an ideal race, living a blissful outdoor life, which you may read about in Melville's "Typee," and in O'Brien's "White Shadows in the South Seas." This race conformed to all the requirements of the nature enthusiast. They went practically naked, their houses were open all the time, they lived on the abundant fruits of the earth. To be sure, they were cannibals, but this was more a matter of religious ceremony than of diet. They ate their war captives, but this was only after battle, and not often enough to count, one way or the other, in matters of health. They had lived for uncounted ages in perfect harmony with their environment; they were happy and free; and certainly, if such a thing were possible to human beings, they should have been proof against germs. But a ship came to one of these islands, and put ashore a sailor dying of tuberculosis, and in a few years four-fifths of the population of this island had been wiped out by the disease. What tuberculosis left were finished by syphilis and smallpox, and today the Marquesans are an almost extinct race.

But there is another side to the argument—and one more favorable to the nature cure enthusiast. We civilized men, by soft living, by self-indulgence and lack of exercise, may reduce the tone of our body too far below the standard which our ancestors set for us; and then the common disease germs get us, then we have colds, sore throats, tuberculosis. The nature cure advocate is perfectly right in saying that there is no use treating such diseases; the thing is to restore the body to its former tone, so that we may be superior to our normal environment and its strains.

You know the poem of the "One Hoss Shay," which was so perfectly built in every part that it ran for fifty years and then collapsed all at once in a heap. But the human body is not built that way. It always has one or more places which are weaker than the others, and which first show the effects of strain. In one person it will take the form of dyspepsia, in another it will be headaches, in another colds, in another decaying teeth, in another hardening of the arteries or stiffening of the joints. But whatever the symptoms may be, the fundamental cause is always the same, an abnormal condition of the blood-stream, and a consequent lowering of the body's tone. Therefore, studying any disease and its cure, you have first the emergency question, are there any germs lodged in the body, and if so, how can you destroy them? As part of the problem, you have to ask whether your blood-stream is normal, and if not, what are the methods by which you can make it normal and keep it so? Also you have to ask, what are the reasons why your trouble manifests itself in this or that particular organ? Is there some weakness or defect there, and can the defect be remedied, or can your habits be changed so as to reduce the strain on that organ? Are there any measures you can take to increase the flow of blood to that organ, and to promote its activity? In the study of your health, you will find that circumstances differ, and the importance of one factor or the other will vary; but you will seldom find any problem in which all these factors do not enter, and you will seldom find an adequate remedy unless you take all the factors into consideration.

CHAPTER XIX
EXPERIMENTS IN DIET

(Narrates the author's adventures in search of health, and his conclusions as to what to eat.)