required to light the fires and run the engine. It is only by a conservatism both wise and firm that progress can be made continuous and reform permanent. Nor is there any imminent probability that old age will furnish a larger array of conservative force than the world needs. If in the advancement of physical and moral hygiene the time should come when the hoary head shall be in due season the normal crown of every man, and, according to the Hebrew hyperbole, "the child shall die an hundred years old," society will have attained a summit-level at which there will be need neither of engineers nor of brakemen.
Meanwhile, it is well for mankind that old men are so few. Were they more numerous, and at the same time worthy to retain the confidence of their fellow-men, the young would lack the exercise and discipline of their powers which alone could fit them for an honorable and useful old age. Death oils all the wheels of life. It is always throwing heavy responsibility on those who do not seek it, but accept it as a necessity, and gird themselves to bear it faithfully and nobly. As in a well-trained army the reserved forces rush in to fill the places of the fallen, so in the battle of life the ranks of the dying are recruited by those who are biding their time. Death is the ripener of manly force and efficient virtue, which would droop under the dense shadow of thoroughly matured and still active service, but are stimulated into full vitality and work-
