or upper arm, or the back or front of his chest which has been in action, for none of these have felt fatigue, the tire being all confined to the muscles in question. Again, had there been beside him two men of nearly the same weight, but one of small and feeble calves, the other having them shapely and well-developed, is there any doubt which of the two could have kept at the exercise the longer, yet with the less fatigue? Few men need be told that a muscle, unused to work at first, can gradually, by direct and systematic exercise, be strengthened; but not a few there are who are unaware that with the new strength comes increased size as well. Yet, to those familiar with athletic work, it is as plain as that you must have your eyes open if you want to see. A gentleman of our acquaintance, of magnificent muscular and vital development, was not satisfied with the girth of his calves, which was 14-1/4 inches. At our suggestion he began practising this simple raising and lowering of the heels. In less than four months he had increased the girth of each calf one whole inch. When asked how many strokes a day he averaged, he said, "From fifteen hundred to two thousand;" varied some days by his holding in each hand during the process a twelve-pound dumb-bell, and then only doing one thousand or thereabouts. The time he found most convenient was in the morning on rising, and just before retiring at night. Instead of the work taking much time, seventy a minute was found a good ordinary rate, so that fifteen minutes at each end of the day was all he needed. But this was a great and very rapid increase, especially for a man of thirty-five; far more than most persons would naturally be contented with, yet suggestive of the stuff and perseverance of the man who accomplished it. Here, then, one of the most effective exercises which could be desired for the strengthening of these muscles is accomplished actually without apparatus, without one cent of expense--one which can be practised anywhere, in the largest or the smallest room, in-doors or out, on land or while at sea. But there are many other exercises which will bring this same development. Now stand erect again, with head and chest high, shoulders low, and knees sprung back. Start off at an ordinary pace, and walk. But, instead of, as usual, putting the foot down and lifting it without thinking about it, this time, just as it leaves the ground, press hard with the soles and toes. Go on for a block or two, and you will suddenly find that your calves are having new and unwonted duties--indeed, a very generous share of work. Keep on for a mile--if you can. Good a walker as you thought yourself before, a mile of this sort will be a mile to be remembered--certainly for a few days, till the ache gets out of your calves.