This outer-label system once established, in strict correspondence with the catalogue, the only part of the librarian's work remaining to be prescribed in this field, concerns the kind of label to be selected, and the method of affixing them to the books. The adhesive gummed labels furnished by the Library Bureau, or those manufactured by the Dennison Company of New York have the requisite qualities for practical use. They may be purchased in sheets, or cut apart, as convenient handling may dictate. Having first written in ink in plain figures, as large as the labels will bear, the proper locality marks, take a label moistener (a hollow tube filled with water, provided with a bit of sponge at the end and sold by stationers) and wet the label throughout its surface, then fix it on the back of the book, on the smooth part of the binding near the lower end, and with a piece of paper (not the fingers) press it down firmly to its place by repeated rubbings. If thoroughly done, the labels will not peel off nor curl up at the edges for a long time. Under much usage of the volumes, however, they must occasionally be renewed. When the books being prepared for the shelves have all been duly collated, labelled and stamped, processes which should precede cataloguing them, they are next ready for the cataloguer. His functions having been elsewhere described, it need only be said that the books when catalogued and handed over to the reviser, (or whoever is to scrutinize the titles and assign them their proper places in the library classification) are to have the shelf-marks of the card-titles written on the inside labels, as well as upon the outside. When this is done, the title-cards can be withdrawn and alphabeted in the catalogue drawers. Next, all the books thus catalogued, labelled, and supposed to be ready for the shelves, should be examined with reference to three points: 1st. Whether any of the volumes need re-lettering. 2nd. Whether any of them require re-binding. 3rd. If any of the bindings are in need of repair. In any lot of books purchased or presented, are almost always to be found some that are wrongly or imperfectly lettered on the back. Before these are ready for the shelves, they should be carefully gone through with, and all errors or shortcomings corrected. It is needful to send to the binder 1st. All books which lack the name of the author on the back. This should be stamped by the binder at the head, if there is room--if not, in the middle panel on the back of the book. 2nd. All books lettered with mis-spelled words. 3rd. All volumes in sets, embracing several distinct works--to have the name of each book in the contents plainly stamped on the outside. 4th. All books wholly without titles on the back, of which many are published--the title being frequently given on the side only, or in the interior alone.