Page:De Vinne, Invention of Printing (1876).djvu/536

526 the deterioration of printing in other branches, it is, beyond all cavil, certain that in the art of arranging types so that the meaning of the author shall be made lucid, the modern compositor is much the more intelligent mechanic.

Improvements were made slowly. The method of spacing out lines so as to produce a regular outline at the right side of every page had been practised before, but it was not in general use even as late as 1478. Arabic figures, instead of Roman numerals, were first used by Ter Hoorne of Cologne, and by Helye of Munster in 1470. Signatures to guide the binder in putting together in order the different sheets of a book were first used in printed books by Zarot of Milan in 1470. As the alphabetical letters of these signatures often had to be doubled, and sometimes quadrupled in thick books, it became necessary to print a full list of the signatures at the end of every book as an additional guide to the binder. This list, registrum chartarum, seems to have been first used by Colonna at Venice in 1475. The clumsiness of doubled alphabetical letters should have led to the use of Arabic figures for signatures, and should have suggested paging, but these reforms were not adopted for many years afterward. A table of errata, two pages folio, was exhibited by Gabriel Peter of Venice in 1478. The first full title, if a few lines in compact capital letters can be so called, was made by Ratdolt of Venice in 1477, but his example was not rapidly followed by rival printers. Running-titles and open chapter-headings are innovations of the next century. The printers of the fifteenth century who wished to free themselves from dependence on the illuminator filled up the white spaces about chapter-headings with bits of engraving on wood or metal.