In the course of evolution from brute to man some of our organs have been highly developed by constant use, while others have been stunted by habitual disuse. In special adaptations of the sense of touch and sight, for instance, man surpasses all his fellow-creatures, most of whom, in turn, surpass him in the acuteness of their olfactory organs. An analogous result seems to have been produced by the exercise or neglect of certain mental faculties and dispositions. The instinct of enterprise, for instance, has been developed from rather feeble germs of the animal soul, while the instinct of perseverance appears to have lost something of its pristine energy. The African termite ant rears structures which, in proportion to the size of the builders, surpass the pyramids as a mountain surpasses the monuments of the mound-builders. By the persistent coöperation of countless generations the tiny architect of the coral reefs has girt a continent with a rampart of sea-walls. The prairie wolf will follow a trail for half a week. The teeth of a mouse are thinner and more brittle than a darning needle, yet by dint of perseverance gnawing mice manage to perforate the stoutest planks. Captive prairie dogs have been known to tunnel their way through forty feet of compact loam. An instinct, which one might be tempted to call a love of perseverance for its own sake, seems sometimes to influence the actions of young children. There are boys whose energies seem to be roused by the resistance of inanimate things. I have seen lads of eight or nine years hew away for hours at knotty logs which even a veteran woodcutter would have been pardoned for flinging aside. There are school boys, not otherwise distinguished for love of books, who will forego their recess sports to puzzle out an arithmetical problem of special intricacy. Our desultory mode of education hardly tends to encourage that disposition which, nevertheless, is now and then apt to develop into a permanent character trait. There are young men who will act out a self-determined programme of study or business with persistent disregard of temporary hardships, and pursue even minor details of their plan with a resolution only strengthened by difficulties. The moral ideals of antiquity seem to have been more favorable to the development of that type of character, which also manifests itself in the national policy of several ancient republics, and the inflexible consistency of their legal institutions. B.—REWARDS OF CONFORMITY.