Fifth. There is another department of usefulness for public libraries, quite unknown until within a few years, which makes them actual and vital members of the public-school system, and additionally justifies the term "People's Universities," which has often been applied to them. This is the arrangement at the library of courses of illustrative study and reading for teachers or pupils, or both. A series of such books as relate to one or another part of the school course is laid out at the library; the teachers, and perhaps sometimes one of the higher classes, examine them along with the librarian, and such information as they afford is used to fill out and illustrate the outline in the school-book for the fuller information of the pupils. This practice is perhaps easiest in history and geography. It is easy to see how a capable teacher could intensify the interest and enrich the minds of a class about the geography of the East Indian archipelago, by introducing them to the vivid narrative and abundant illustrations of Wallace's most entertaining and instructive book on that region. How, for instance, Palgrave's "Year in Arabia," Palmer's "Desert of the Exodus," Lady Duff Gordon's "Letters from Egypt," O'Donovan's "Merv Oasis," Atkinson's and Kennan's books on Siberia, Huc's "Travels in Tartary and in China," and hundreds of other books, each for its locality, all over the world, could be used to give a child clear notions and strong impressions of savage or civilized landscapes and people. It is not too much to say that the study of geography in the public schools of San Francisco, illustrated as it could easily be from books of travel now in the public library, could be made from beginning to end as fascinating as any romance, while it would store the children's minds with a kind and quantity of distinct knowledge about the earth and its people as much beyond the results of ordinary geographical study as gold is better than mud. It would be easy to furnish similar specifications for the study of history, of natural science, and other branches. This is no mere speculation. This system of instruction is regularly practised by Mr. Green, of the Worcester Free Library (the originator and pioneer in it); by Mr. Poole at Chicago, and elsewhere, and with complete success. Besides its immediate result in vivifying and enriching the pupil's minds, this method affords a training in habits of reading of the very best kind, by teaching research, the habit of selecting books, and the practice of comparative thinking. To sum up: A free public library-- 1. As to manners--is a parlor, not a bar-room; a place where not only working men and business men, but ladies and young girls can safely and conveniently come and abide. While not expressly a school of manners and morals, it is much and closely concerned in maintaining a high standard in both.