It may not be feasible. But if such a scheme can be operated at all it may perhaps be operated most effectively through the library which for its own uses is cataloging and printing a card for every book currently copyrighted in the United States, and for a larger number of others than any other single institution. Such must be confessed of the Library of Congress. It is printing a card for every book currently copyrighted, for every other book currently added--for every book reached in re-classification--and thus in the end for every book in its collection. It is now printing, at the rate of over 200 titles a day--60,000 titles a year. The entry is an author entry, in form and type accepted by the committee on cataloging of the A. L. A. The cards are of the standard size--3 × 5 inches--of the best linen ledger stock. From 15 to 100 copies of each are now printed. It would be uncandid to say that such a number is necessary for the use of the library itself, or of the combined libraries at Washington. The usefulness of copies of them to any other library for incorporation in its catalogs must depend upon local conditions: the style, form, and size of its own cards, the number of books which it adds yearly, the proportion of these which are current, and other related matters. On these points we have sought statistics from 254 libraries. We have them from 202. With them we have samples of the cards in use by each, with a complete author entry. Having them we are in a position really to estimate the chances. I will not enter into details. Summarily, it appears that our cards might effect a great saving to certain libraries and some saving to others, and would entail a mere expense without benefit to the remainder--all of which is as might have been guessed.