adjusted that the breaking of a narrow band of tape in the folder, the loosening of a nut, the slightest bending of a rod, friction in a bearing, or any other derangement, no matter how slight, is instantly apparent to the skilled machinist in charge. [Illustration: OCTUPLE STEREOTYPE PERFECTING PRESS AND FOLDERS (printing on both sides of the paper). Capacity 96,000 4-, 6-, or 8-page papers per hour; down to 24,000 24-page papers per hour. A, paper rolls (Webb's), sometimes five miles long; B, printing cylinders, each one carrying sixteen plates (pages); C, blanket or impression cylinders; D, inking motion (fountain and inking rollers); F, folding mechanism or formers (four of these); G, deliveries (four of these); H, controlling lever; I, bar slitting, pasting, collating, and collecting devices (between press and folders). (We are indebted to the courtesy of R. Hoe & Co. for permission to reproduce this photograph. This picture and the succeeding one represent the most powerful and complete printing presses which have been constructed up to date.)] [Illustration: SEXTUPLE STEREOTYPE PERFECTING PRESS AND FOLDERS (with color attachment for printing three additional colors on outside pages). It prints per hour 48,000 4-, 6-, 8-, 10-, or 12-page papers, 36,000 16 page papers, or 24,000 14-, 16-, 20-, or 24-page papers--all delivered folded, pasted, and counted. Also magazines with pages half the size of the newspaper pages, one half the pages printed in four colors and the other half in one color, at the rate of 48,000 of 8, 12, 16, 20, or 24 pages, and 24,000 of 28, 32, 40, or 48 pages, delivered folded to page size, cut open at the heads, bound with wire staples, and counted. (We are indebted to the courtesy of R. Hoe & Co. for permission to reproduce this photograph.)] The white paper used in making the newspapers of to-day is manufactured from wood pulp and is put up in long rolls, wound about an iron cylinder that can be adjusted in place at one end of the press. These rolls contain from two to four miles of paper, and weigh from eight hundred to twelve hundred pounds each. As soon as one roll is used up another is lifted into place, the loose ends of the two are pasted together, and, after a stop of less than two minutes, the great press is again belching forth finished newspapers at the rate of sixteen hundred a minute, or two hundred and sixty-six each second.