The pamphlet, or thin book, or tract (as some prefer to call it) is reckoned by some librarians as a nuisance, and by others as a treasure. That it forms rather a troublesome asset in the wealth of a library cannot be doubted. Pamphlets taken singly, will not stand upon the shelves; they will curl up, become dogs-eared, accumulate dust, and get in the way of the books. If kept in piles, as is most frequent, it is very hard to get at any one that is wanted in the mass. Then it is objected to them, that the majority of them are worthless, that they cost altogether too much money, and time, and pains, to catalogue them, and that they are useless if not catalogued; that if kept bound, they cost the library a sum out of all proportion to their value; that they accumulate so rapidly (much faster, in fact, than books) as to outrun the means at the disposal of any library to deal with them; in short, that they cost more than they come to, if bound, and if unbound, they vex the soul of the librarian day by day. This is one side of the pamphlet question; and it may be candidly admitted, that in most libraries, the accumulation of uncatalogued and unbound pamphlets is one of the chief among those arrears which form the skeleton in the closet of the librarian. But there is another side to the matter. It is always possible to divide your pamphlets into two classes--the important, and the insignificant. Some of them have great historical, or economic, or intellectual value; others are as nearly worthless as it is possible for any printed matter to be. Why should you treat a pamphlet upon Pears's soap, or a quack medicine, or advertising the Columbia bicycle, with the same attention which you would naturally give to an essay on international politics by Gladstone, or a review of the Cuban question by a prominent Spaniard, or a tract on Chinese immigration by Minister Seward, or the pamphlet genealogy of an American family? Take out of the mass of pamphlets, as they come in, what appear to you the more valuable, or the more liable to be called for; catalogue and bind them, or file them away, according to the use which they are likely to have: relegate the rest, assorted always by subject-matters or classes, to marked piles, or to pamphlet cases, according to your means; and the problem is approximately solved.