Page:The Art of Bookbinding, Zaehnsdorf, 1890.djvu/60

30 the first sheet and out, then another sheet is placed on the top, and the needle inserted at the first band and brought out at band No. 2, the needle is again inserted in the first sheet and in at the second band and out at No. 3, thus treating the two sections as one; in this way it is obvious that only half as much thread will be in the back. With regard to books that have had the heads cut, it will be necessary to open each sheet carefully up to the back before it is placed on the press, otherwise the centre may not be caught, and two or more leaves will be detached after the book is bound. The first and last sections of every book should be overcast for strength. With regard to books that are composed of single leaves, they are treated of in Chapter III. They are to be overcast, and each section treated as a section of an ordinary book, the only difference being, that a strong lining of paper should be given to the back before covering, so that it cannot "throw up." When a book is sewn, it is taken from the sewing press by slackening the screws which tighten the beam, so that the cord may be easily detached from the keys and lay cords. The cord may be left at its full length until the end papers are about to be put on, when it must be reduced to about three inches. Brehmer's patent wire book and pamphlet sewing machine is an introduction well adapted to the use of the stationer, where thick and hand-made paper will bear such a method. It will not, in my opinion, ever be found eligible for library or standard books. Its high price will debar it from the trade generally; but it is to be feared that a sufficient number of really good books may be sewn with it to cause embarrassment to the first-rate binder, who will be baffled in making good work of books which may have been damaged by the invention of sewing books with wire.