Some years since, before I had seen the work of Professor Kloss on the Dumb-Bell, I published a paper upon the use of this piece of apparatus, in which I stated the best weight for men as from two to five pounds, and gave at length the reasons for the employment of such light weights, and the objections to heavy ones. I was filled, not with pride, but with profound satisfaction, while engaged in translating Kloss's work recently, to find, as fundamental with this great author, identically the same weights and reasons. In my early experience as a teacher of gymnastics I advocated the use of heavy dumb-bells, prescribing those weighing one hundred pounds for persons who could put up that weight. As my success had always been with heavy weights, pride led me to continue their use long after I had begun to doubt the wisdom of such a course. I know it will be said that dumb-bells of two pounds' weight will do for women and children, but cannot answer the requirements of strong men. The weight of the dumb-bell is to be determined entirely by the manner in which it is used. If only lifted over the head, one or two pounds would be absurdly light; but if used as we employ them, then one weighing ten pounds is beyond the strength of the strongest. No man can enter one of my classes of little girls even, and go through the exercises with dumb-bells weighing ten pounds each. We had a good opportunity to laugh at a class of young men, last year, who, upon entering the gymnasium, organized an insurrection against the wooden dumb-bells, and through a committee asked me to procure iron ones; I ordered a quantity, weighing three pounds each; they used them part of one evening, and when asked the following evening which they would have, replied, "The wooden ones will do." A just statement of the issue is this: If you only lift the dumb-bell from the floor, put it up, and then put it down again, of course it should be heavy, or there is no exercise; but if you would use it in a great variety of ways, assuming a hundred graceful attitudes, and bringing the muscles into exercise in every direction, requiring skill and followed by an harmonious development, the dumb-bell must be light. There need be no controversy between the light-weight and the heavy-weight party on this point. We of the light-weight party agree, that, if the dumb-bell is to be used as the heavy-weight party uses it, it must be heavy; but if as we use it, then it must be light. If they of the heavy-weight party think not, we ask them to try it. The only remaining question is that which lies between all heavy and light gymnastics, namely, whether strength or flexibility is to be preferred. Without entering upon a discussion of the physiological principles underlying this subject, I will simply say that I prefer the latter. The Hanlon brothers and Heenan are, physiologically considered, greatly superior to heavy-lifters.