Among the most interesting modern printing machines are those constructed by Hoe & Co. at their London works, after drawings and patterns sent from New York, for weekly English journals, such as “Tit-Bits,” “Sunday Stories,” and similar periodicals. These machines embody to a certain extent the principles of the “Double Supplement” press before referred to. Double sets of plates are placed upon the main machine, which is capable of taking on an aggregate of twenty-four pages; and by using narrower rolls the number of pages of the body of the journal may be reduced to sixteen or twenty, so that the publisher may have the option of printing his paper either sixteen, twenty or twenty-four pages. In addition to this it prints a cover on a different colored paper, and all at the rate of 24,000 copies per hour; the whole product, including the cover, being cut on the edges and pasted together at the back. The supplement or cover of the press portion, however, instead of having two pairs of cylinders, as in the “Double Supplement” machine, consists of one form cylinder and one impression cylinder. This portion of the machine prints the cover, which is fed from a narrower roll, and, as before stated, of an entirely different color or quality of paper from the body of the journal. The form for one side of the cover is placed on one end of the form cylinder, and that for the other side on the other end of the cylinder. This ingenious combination results in the printing of one cover to every copy of the journal issued and no more. The demand for printed matter seems to increase with the ability to furnish it, and much attention is now being directed to the subject of color printing on the rotary system. From present appearances, and from the enterprise displayed by the publisher, the artist and the press maker, it would seem as though the day is not far distant when this subject alone would furnish matter for a new chapter in the history of the printing press. It is very difficult to give in a short article even a summary of the various kinds of machines to print newspapers of various sizes, in black as well as in colors, weekly periodicals, magazines, books, pamphlets, in short every class of printing, in connection with folding, which have been evolved and perfected up to the present time. The work still goes on, one step in advance leading to another, until now a printer can obtain a great variety of machines to print from the roll or fed from separate sheets, and which, especially in the production of large numbers, economize both time and labor. Nor is this constant advance in mechanical construction confined to the machines themselves or the manipulation of the paper. It extends to the manufacture of the paper and the inks, although the manufacturers of the latter have not advanced in the same proportion as the paper-maker, who every year produces finer paper in the roll and in greater quantities than ever before. [Illustration: OCTUPLE PRESS]