Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It is just so with the human body which, after all, is a machine too, and, more than that, it is the most wonderful and perfect machine in the world. With care it should last many years. With abuse or neglect it may very soon wear out. The boy who neglects his health is like the boy who allows the bearings on his wheel to become dry or the metal parts rusty. The chief difference is that when the bicycle wears out or breaks down we may replace the parts or even buy another machine, but when our health is injured, money will not restore it. In order to keep well we must observe certain rules of health. By exercise we keep the working parts in good order. If we are lazy or indolent we are like the bicycle that is allowed to go to pieces from lack of use. If we are reckless and foolhardy we may injure some part of the delicate machinery from excessive exercise or strain.
