[Illustration: BOOK-FOLDING MACHINE.]
Book and Newspaper Folders are entitled to a high rank among modern
labour-saving machines. For newspapers of large circulation and in book
establishments they have become indispensable. The finest books may be
folded by them with accuracy, speed, and economy; and periodicals can be
folded, pasted, and covered at about one-fourth the cost of hand-folding
alone; while the daily folio newspaper can be folded in two, three, or
four folds as fast as the machine press can print; or an eight-page
daily or weekly can be folded three or four times, and all the pages
pasted together at the back fold, and the head margin trimmed. All these
processes are successfully accomplished by the various machines made
by Chambers, Brother & Co. of Philadelphia. The engraving given above
represents a book-folding machine.