Try a summer of mountain climbing. Look at the men who spend their lives at it. Notice the best stayers in the Alpine clubs, and almost invariably they are found to have large and powerful calves, especially where their knees are not bent much in stepping. In a personal sketch of Bendigo, the once celebrated British prize-fighter (now a quiet Christian man), much stress was laid on the fact that his calves measured a clean sixteen inches about. Yet, to show that gentlemen are sometimes quite as strong in given directions as prize-fighters, look at Professor Maclaren's own memorandum of not only what a splendid pair of legs he himself had at the start, but what a little mountain climbing did for them; for he says that in four months of Alpine walking, averaging nine hours a day, his calves went up from sixteen inches to seventeen and a quarter! and his thighs from twenty-three and a half inches to twenty-five. If instances nearer home are sought, and yet where neither anything like the time Maclaren took was given to it, nor any of the very severe work of the gentleman referred to a little earlier, look at what Dr. Sargent accomplished, not with one solitary man but with two hundred, at Bowdoin College; not giving nine hours a day to it, but only "half an hour a day, four times a week, for a period of six months." In this very brief time, and by moderate exercises, he increased the average girth of the calf of these whole two hundred men from twelve and a half inches to thirteen and a quarter. There was one pupil, working four hours a week instead of four half-hours, and for one year instead of six months, who increased his calves from thirteen and a half inches to fifteen--an actual gain of a quarter of an inch more in two hundred and eight hours of exercise, much of which was given to other muscles, and did not tell on the calves, than Maclaren made in nine hundred hours of work, most of which kept these muscles in very active play. In all exercises for these muscles, indeed in all foot-work, shoes should be worn with soles broad enough to prevent the slightest cramping of the foot, and so giving every part of it its natural play.