Then again, the soldier should not smoke, because he ought always to be in training; and no Harvard oarsman needs to be told "that smoking reduces the tone of the system and diminishes all the forces of the body--he _knows_ it." The profound physiological knowledge of the average Harvard under-graduate it would perhaps seem ungracious to question; but upon this point, be it said with due reverence, doctors disagree. We have known athletes who told a different story. Waiving argument for the present, however, we go on presenting Mr. Parton's "certainties." One of these is that every man should be kept all his life in what prizefighters call "condition," which term Mr. Parton supposes to mean "the natural state of the body, uncontaminated by poison, and unimpaired by indolence or excess." Awhile ago we had "drugs," now we have "poison," but not a syllable of argument to show that either term is properly applicable to tobacco. But Mr. Parton's romantic idea of the state of the body which accompanies training is one which is likely to amuse, if it does not edify, the physiologist. So far from "condition" being the "natural (i.e. healthy) state of the body," it is an extremely unnatural state. It is a condition which generally exhausts a man by the time he is thirty-five years old, rendering him what prizefighters call "stale." It is not "natural," or normal, for the powers either of the muscular or of the nervous system to be kept constantly at the maximum. What our minds and bodies need is intermittent, rhythmical activity. "In books and work and healthful play," not "in work and work and work alway," should our earlier and later years be passed; and a man who is always training for a boatrace is no more likely to hold out in the plenitude of his powers than a man who is always studying sixteen hours a day. The only reason why our boys at Yale and Harvard are sometimes permanently benefited by their extravagant athleticism is that they usually leave off before it is too late, and begin to live more normally. For the blood to be continually determined toward the muscles, and for the stomach to be continually digesting none but concentrated food, is a state of things by no means favourable to a normal rate and distribution of nutritive action; and it is upon this normal rate and distribution of nutrition that life, health and strength depend. It is as assisting this process that we shall presently show the temperate use of tobacco to be beneficial. Mr. Parton's idea well illustrates the spirit of that species of "radical" philosophy which holds its own opinions as absolutely and universally, not as relatively and partially, true; which, consequently, is incapable of seeing that one man's meat may be another man's poison, and which is unable to steer safely by Scylla without turning the helm so far as to pitch head foremost into Charybdis. Mr. Parton sees that athletic exercise is healthful, and he