Then the book is placed on the paper, b, Fig. 24, in such manner as to have a straight edge of the paper come just to the marks on the leather and as nearly the same projection at the ends and foredge as possible. With a lead pencil, a line is drawn on the paper around the board. Corners for the mitres are cut, always cutting not closer to the pencil mark than the thickness of the board, as explained in the previous binding. This done, the paper is covered with paste, the book again laid on in position indicated by marks, and the turn-ins pasted.

The other board is now treated in the same manner. Great care is necessary to make sure that the paper fits firmly against the edge of the board. The bone folder is used here to force the paper against the edge of the board before the turn-in is pasted down on top.

The paper at the corners usually does not make a perfect mitre, but laps. This is remedied by taking a sharp knife and cutting through the lapping papers and removing the pieces cut off.

The book is now put under light pressure until dry. Nothing remains now but to paste the colored endpapers to the boards, the same as in the previous binding. It will be seen on opening the book how much flexibility the zigzag has lent to the cover.

IV.
EXTRA BINDING.

1. Three-quarters Morocco. 2. Sewed on cords; cords laced into boards. 3. Flexible back. 4. Edges cut in boards, head colored. 5. Rounded and backed. 6. Zigzag endpapers, colored pastedown. 7. Head and foot bands, silk thread over heavy cords. 8. Blind or gold tooled and lettered.

Cords.

The sewing frame is prepared exactly in the same way as in the Library Binding except that cords are here used instead of tapes, Fig. 25. Endpapers are cut and prepared zigzag, book marked up and punctures sawed the same as in the Library Binding.

These are the distinct differences between sewing on cords and on tapes. With cords, the needle goes in at the head puncture and out on the left of the cord and then doubles back and from the right of the cord, the needle is inserted at the same hole through which it came out, completely encircling the cord with the thread, a, Fig. 25. This is the whole story of sewing on cords. In the use of tapes, the thread simply goes back of the tapes, not around them. The kettlestitches are made just as in sewing on tapes, but there are no catch or crowfoot stitches as with tapes. When the book is taken from the sewing frame, the back is rounded. In this process, judgment must be used not to get the back too convex.