A much wiser course would be to keep the human machinery oiled and in good condition, by systematic exercise. Hinges of iron and steel must be oiled and used to keep them from creaking and rusting. The membrane that secretes the lubricating fluid and supplies it to the opposing surfaces of the bones and to the ligaments which surround them is stimulated to activity by the motion of the joint itself. Stiffening joints, sluggish circulation, and torpid liver are the sure penalties of inactivity. Some years ago, two prominent business men, one sixty-four, the other sixty-three years of age, engaged in a walking contest. The younger walked 209 miles, the older 211 miles in three and one-half days, an average of sixty miles a day. James Russell Lowell was unwilling to ride when he could possibly walk. Gladstone was famous as an ax-man as well as a statesman, and continued this exercise nearly to the end of his life. Instances of great mental activity after seventy are almost invariably those of men who have kept up since early manhood a constant habit of vigorous daily exercise. It is only in this way that the arteries are kept from hardening, and that the brain is kept supplied with the blood to renew its cells. =Physical Culture for School Children.=--In childhood and youth, bad habits are easily corrected and good ones established. If the chest is weak and flat, this is the time to remove the defect. If one shoulder is a trifle higher than the other, correct the default before it becomes confirmed. Build up the arms and shoulders and chest to be strong and well shaped. It is in youth, while the bones are elastic, that the perfect frame must be built. Accustom the muscles of the trunk and limbs to healthy and graceful action. This becomes easy and natural, when given proper direction, and will result in making a vigorous, well-built man or woman, capable of meeting the difficulties and discharging the duties that come alike to all. =Over-Study.=--A prominent magazine recently devoted a page to brief statements of parents, teachers, and physicians, testifying in eloquent but most pathetic terms to the crying evils of over-study and the lack of physical recreation. In reply to the questions asked, one physician says, “Twelve children are under my professional care from over-study.” Another writes, “During the last school year I treated over forty children suffering from over-study. In more than thirty of the cases I had to advise withdrawal from school.” A parent says, “We have four daughters, and had to take all of them out of school.” From the sufferers themselves we have, “At seventeen I broke down. Today, at thirty, I am still an invalid.” “For twelve years I, a young woman, have tried to overcome nervous prostration, directly brought on by over-study.” “Pushed beyond my endurance as a child, I am to-day a nervous mother with children so nervous that it is pitiable.”