The next very important thing that man has to attend to is his health. In some other respects, progress has been made during the last hundred years, and several considerable obstacles to the acquisition of a stable happiness have been removed or diminished. In the best parts of the best countries, so much knowledge is now freely offered to all the young as suffices to place within their reach all existing knowledge. We may say with confidence that the time is not distant when, in the United States, no child will live farther than four miles from a school-house, kept open four months in the year, and when there will be the beginning of a self-sustaining public library in every town and village of a thousand inhabitants. This great business of making knowledge universally accessible is well in hand; it has gone so far that it must go on till the work is complete.