Under this system the borrower can tell, by looking at his card, on what date the book he has was taken from the library. If he wishes to renew it without taking it back to the library, he can do so by a letter stating that he took on a certain day a book bearing a certain number, and wishes it renewed. The librarian can tell, from the book-cards, what books are in circulation, and how many of each class were lent on a certain day. [Illustration: No. 1. Postal notice. (Reduced.) City Library Association Springfield, Mass. Feb. 14, 1899. The book noted below is now in the library and will be reserved for you until 9 P.M., Feb. 15. _Please present this notice and your library card._ A charge of two cents is made for this notice. JOHN COTTON DANA, _Librarian_. Per. S.M.J. _Book No._ 2173.54 _Title, etc._ Ave Roma Immortalis. Reserve Postal, Form 1, Jan. 30. '98, 500] The borrower's number, written on the book-card of any given book in circulation, will give, through the register of borrowers, the name and address of the person having that book. Overdue books are automatically indicated, their cards remaining in the tray, behind the card indicating the date they were lent, after the day for their return has passed. When a borrower returns a book the librarian can learn, from the date on the pocket, whether or no a fine should be paid on it; if not, he can, if in haste, immediately take out the borrower's card from the book pocket, stamp the date of its return at the right of the date on which it was lent, thus canceling the charge against the borrower, and lay the book aside and look up its book-card later. [Illustration: No. 2. Registration card, face. (Reduced; actual size, 7-1/2 x 12-1/2 cm.) Name. Geo. Brown No. 80 Residence. 72 Vernon. Employment. Machinist. Employer. Smith & Wesson's. Place of business. 85 Main.] [Illustration: No. 3. Registration card, reverse. (Reduced; actual size, 7-1/2 x 12-1/2 cm.) Feb. 14, 1899. I hereby declare that I am a resident of the City of Springfield, and in consideration of the right to use the Free City Library, agree to comply with all Regulations provided for its government. George Brown. I hereby certify that the above subscriber is a fit person to enjoy the privileges of the City Library, and that I will be responsible for any loss or injury the Library may sustain from the permission given to draw books in consequence of this certificate. Signature (in ink) Residing at No. Street.]