Arguments to show the importance of exercise, might be drawn from every part of the animal economy. Without it, the circulation of the blood cannot be properly carried on, nor the different secretions duly performed; neither can the fluids be properly prepared, nor the solids rendered firm or strong. The action of the heart, the motion of the lungs, and all the vital functions, are greatly assisted by exercise. But to point out the manner in which these effects are produced, would lead us beyond the present subject.