Such a development of the art of printing, especially in colors, in which accurate register is not only necessary, but must be maintained, would have seemed incredible a few years ago, but this is now a daily occurrence and many newspaper offices produce colored supplements in the same manner and with the same results, having additions placed upon their quadruple, sextuple and other presses for the purpose. [Illustration: “COLLIER’S WEEKLY” PRESS] Nor has this development of colors been confined entirely to the demands of the newspaper world. It is gradually finding its way into the weekly periodical and the monthly magazines. It had been considered impossible to print half-tone illustrations on both sides of the sheet at one operation and deliver them flat, without smutting. Not only has this difficulty been overcome, but in the latest presses, such as used by Collier’s Weekly, the finest half-tone work is done on a perfecting press printing on a roll of paper. The periodical is printed in multiple pages, as required, and delivered from the machine folded, cut apart and pasted, ready for the binder. It is not desirable, of course, when using fine inks, to make immediate delivery from the press; therefore the papers, after having been perfected, folded and pasted, are left to stand for some hours before they are distributed to the readers. Satisfactory methods of doing this have also been devised. The capacity for printing fine half-tone illustrations on a rotary press having thus been demonstrated the next step is evidently the production of colored half-tones, and the time is undoubtedly near at hand when the monthly magazine as well as the weekly periodical will appear, instead of in black half-tones, now so popular, with these same illustrations printed in the most delicate manner in colors and all delivered in perfection from rotary presses, folded in entirety, or in signatures, ready for the binder. It must now be evident to every experienced observer that the time has arrived when printing upon the rotary system will in a large measure supersede that now done upon flat-bed cylinder presses, although the latter will always be retained for some kinds of work. Satisfactory methods will be devised for attaching upon the cylinders electrotype or stereotype plates of varying sizes. In addition to this, new and improved methods are constantly being brought forward for the transferring of type forms, photographs and illustrations of every description, upon prepared sheets of metal, which receive the ink and give impressions either from a raised surface, as in the ordinary letter-press printing, or in the manner of lithographic printing. These and other new methods of making plates will undoubtedly lead in the future to great economy, as well as to important improvements in the process of printing. ROBERT HOE. [Illustration: (Colophon)] [Illustration: (FROM MEDAL BY SCHARFF)]