Vignettes, how to prepare on the press, 281. Walter perfecting press, 244. Warehouse book, form of, 293. department, 293-298. Warehouseman, duties of, 293. Warping of a cut, how to cure, 282. how to prevent, 282. Washing forms, directions for, 264, 265. Washington press, how to set up, 250. invented by Samuel Rust, illustrated, 237. Waterproof paper, how to make, 317. Watts, John, 21. Web perfecting presses, 242-246. Wells’s job presses, 246. Wet paper, how to be protected overnight, 264. Wetting paper, directions for, 255-257. drawing and plate paper, 256. rules for giving out paper for, 294, 295. Wetting-trough, how to be made, 255. White, Elihu, type-founder in New York, 21, 22. White pages, how to be treated, 259. Wood-cuts, how to prepare on the press, 280-283. how to wash, 283. how to take proof of, 283. Wood engraving, tools for, 34. type, how to be cared for, 292. Woollen blankets, needless when new type is used, 257, 266. Words and phrases, foreign, 357-372. Working in pocket unsatisfactory, 227. Works, how to manage hurried, 226. Wrinkles in paper, how to remove, 263. Writing inks, coloured, how to make, 314. Yellow ink, how to produce, 287, 288. Zarotti, Antonio, the inventor of signatures, 16. Zell, Ulrich, printer of the _Chronicle of Cologne_, 9. Zodiacal signs, 73. [Illustration] FOOTNOTES [1] The earliest testimony in favour of Koster is contained in a German volume published at Cologne in 1499, known as the _Chronicle of Cologne_, which was printed by Ulrich Zell, originally of Mayence, and a well-known follower of Gutenberg and his system. Under the heading “Of the art of printing books, when and where, and by whom, was invented the inexpressibly useful art of printing books,” the author says, “Although the art, as now practised, was discovered at Mayence, nevertheless the first idea came from Holland, and the Donati, which had been previously printed there. Those books are therefore the origin of the art.”—See _Humphreys_, ch. iii. and iv. We cite further the following well-known account:—