For instance, I had never taken any stock in the arguments for vegetarianism upon the moral side. It has always seemed to me that human beings have a right to eat meat, if meat is necessary for their best development, either physical or mental. I have never had any sympathy with that "humanitarianism" which tells us that it is our duty to regard pigs and chickens as our brothers. I was listening the other day to one of these enthusiasts, who had been reading aloud one of the "Uncle Remus" stories, and who went on in touching language to set forth the fact that his vegetable garden constituted one place where "Bre'r Rabbit" was free to wander at will and to help himself; and he described how happy it made him to see these gentle animals hopping about among his cabbages, having lost all their fear of him. That sort of thing will work very well so long as it is confined to one farm, and so long as there is a hunting season upon all the other farms in the locality; but let the humanitarians proceed to apply their regimen in a whole state, and they will soon have so many billions of rabbits hopping about among their cabbages that they will have to choose between shooting rabbits or having no cabbages.

The reader, I presume, is familiar with calculations which show the rate at which rabbits multiply, how many tens and hundreds of millions would be produced by a single pair of rabbits in ten years. It should be quite obvious that the time would come when all human beings would be spending their energies in planting gardens to support rabbits; and that if ever they stopped planting gardens, there would be a famine for the rabbits, with infinitely more suffering than is involved in the present method of keeping them down. Also, even though the humanitarians might have their way with men, the hawks and the owls and the foxes would probably remain unregenerate. I remember, when I was a small boy, being sternly rebuked by an agitated maiden lady who discovered me throwing stones at a squirrel. Not so many days afterwards, however, the lady discovered the squirrel engaged in carrying off young birds from a nest outside her window, and she found her theories about "kindness to dumb animals" rudely disturbed.

The same thing, it seems to me, is still more true of domestic animals. Domestic animals survive on earth solely because of the protection of man, and for the sake of the benefits they bring to him. If it is necessary to human health and well-being to slaughter a cow rather than to wait and let her die of old age and lingering disease, it seems to me that nothing but mawkish sentimentality would protest.

It is pointed out to us what places of cruelty and filth our slaughter-houses are; the reader may believe that I learned something about this in my preparations for the writing of "The Jungle." But then this is not necessarily true about slaughter-houses—any more than it is necessarily true that railroads must kill and maim a couple of hundred thousand people in this country every year. In Europe they have municipal slaughter-houses which are constructed upon scientific lines, and in which no filth is permitted to accumulate; also they have devised means for the killing of animals which are painless. In the stockyards I have seen a man standing upon a gallery, leaning over and pounding at the head of a steer with a hammer, and making half a dozen blows before he succeeded in knocking down the terrified animal. In Europe, on the other hand, they fit over the head of the animal a leathern cap, which has in it a steel spike; a single tap upon the head of this spike is sufficient to drive it into the animal's brain, causing instant insensibility.

And it must be borne in mind also that the sufferings of dumb animals are entirely different from our own. They do not suffer the pains of anticipation. A cow walks into a slaughter-house without fear, and stands still and permits a leathern cap to be fitted over its head without suspicion; and while it is placidly grazing in the field, it is untroubled by any consciousness of the fact that next week it will be hanging in a butcher's shop as beef. I recall in this connection an observation of that wise philosopher, Mr. Dooley, concerning the inhumanities of vegetarianism. He said that it had always seemed to him a very cruel thing "to cut off a young tomato in its prime, or to murder a whole cradle full of baby peas in the pod."

These things will convince the devotee of the religion of vegetarianism that I am a lost soul, and always have been. Perhaps so. I try to guide my conduct by scientific knowledge; what I ask to know about the question of meat-eating is the actual facts of its effect upon the human organism—the amount of energy which it develops, the diseases which it causes, or, on the contrary, the immunity to disease which it claims to confer; also, of course, its cheapness and convenience as an article of diet. Some evidence of this sort we possess; but very little, it seems to me, in proportion to the importance of the subject. Professor Fisher has conducted some thorough experiments as to the influence of meat-eating upon endurance, which seem to develop the fact that vegetarians possess a far greater amount of endurance than meat-eaters. These experiments are what we want, but they seemed to me, when I read them, to be weak in one or two important particulars. They did not tell us what the vegetarians ate, nor what the meat-eaters ate. Those who are vegetarians at the present day are very apt to be people who have given some thought to the question of diet, and have attempted to adopt sounder ways of life; while, on the other hand, meat-eaters are generally people who have given no thought to the question of health at all—they are very apt to be smokers and drinkers as well as meat-eaters. Also it is to be pointed out that endurance is not the only factor of importance to our physical well-being.

There have been numerous expositions of the greater liability of meat to contamination. Dr. Kellogg, for instance, has purchased specimens of meat in the butcher-shops, and has had them examined under the microscope, and has told us how many hundreds of millions of bacteria to the gram have been discovered. This argument has a tendency to appal one; I know it had great effect upon me for a long time, and I took elaborate pains to take into my system only those kinds of food which were sterilized, or practically so. This is the health regimen which is advocated by Professor Metchnikoff; one should eat only foods which have been thoroughly boiled and sterilized. I have come, in the course of time, to the conclusion that this way of living is suicidal, and that there is no way of destroying one's health more quickly. I think that the important question is, not how many bacteria there are in the food when you swallow it, but how many bacteria there come to be in food after it gets into your alimentary canal. The digestive juices are apparently able to take care of a very great number of germs; it is after the food has passed on down, and is lodged in the large intestine, that the real fermentation and putrefaction begin—and these count for more, in the question of health, than that which goes on in the butcher-shop or the refrigerator or the pantry.

Do not misunderstand what I mean by this. I am not advocating that anyone should swallow the bacteria of deadly diseases, such as typhoid and cholera; I am not advocating that anyone should use food which is in a state of decomposition—on the contrary, I have ruled out of my dietary a number of foods in common use which depend for their production upon bacterial action; for instance, beer and wine, and all alcoholic drinks, all kinds of cheeses, sauerkraut, vinegar, etc. My point is simply that the ordinary healthy person has no reason for terrifying himself about the common aërobic bacteria—which swarm in the atmosphere, and are found by hundreds of millions in all raw food, and in cooked food which has not been kept with the elaborate precautions that a surgeon uses with his instruments and linen; also that the real problem is to take into the system those foods which can be readily digested and assimilated, and which afford the body all the elements that it needs to keep itself in the best condition for the inevitable, incessant warfare with the hostile organisms which surround it.

So far as meat is concerned, of course no sensible person would use meat which showed the slightest trace of being spoiled, nor any meat which had been canned, or ground up and made into messes, such as sausage. If one uses reasonably fresh meat, the bacteria which may be on the outside of it will be killed by proper cooking. And so the question is, it seems to me, what does meat do after it gets into the stomach? And that is a matter for practical experiment, which very few people have made, so far as I have any information. Innumerable people are eating meat, of course; but they are eating it in combination with all other kinds of destructive foods, and they are eating it prepared in innumerable unwholesome ways. So far as I know, no scientist has ever taken a group of normal men and kept them for a certain period upon a rational vegetarian diet, and then put them for another period upon a diet containing broiled fresh meat, and made a thoroughly scientific study of their condition, as, for instance, Professor Chittenden did for his "low proteid" experiments.

For about a year previous to reading about Dr. Salisbury's "meat diet," I had been following the raw-food regimen. I had gained wonderful results from this, and I had written a good deal about it; but I had got these results while leading an active life, and not doing hard brain-work. I found continually that when I settled down to a sedentary life, and to writing which involved a great nervous strain, I began to lose weight on raw food; and if I kept on with this regimen, I would begin to have headaches, and other signs of distress from what I was eating. As an illustration of what I mean, I might say that quite recently I plunged into a novel in which I was very much absorbed, and I lost twelve pounds in sixteen days; and this, it must be understood, without changing my diet in the slightest particular. I went on with the work for about six weeks, and by that time I had lost twenty pounds. In explaining this to myself, I was divided between uncertainty as to whether I was working too hard, or whether I was eating too much. Finally I took the precaution to weigh what I was eating, and to make quite certain that I was eating no more than I had been accustomed to eat during periods when I had remained at my normal weight. I then cut the quantity of my food in half, and found that I lost much less rapidly. This served to convince me that the trouble lay in the fact that I had not sufficient nervous energy left to assimilate the food that I was taking.