Arranged chronologically as an aid to the study of historical printing techniques.

De Germaniae Miraculo, Optimo, Maximo, Typis literarum, earumque differentiis, Dissertatio, qua simul artis typographicae universam rationem explicat. Paulus Pater, PP. Prostat Lipsiae, apud Jo. Frider. Gleditshc et Filium. Anno 1710.
Another copy, missing a couple of leaves at the beginning.

Manuel typographique, utile aux gens de lettres, & à ceux qui exercent les différentes parties de l’Art de l’Imprimerie. Par Fournier, le jeune. Paris: Chez Barbou.

Vol. I (1764).
Better scan at Archive.org.

Vol. II (1766). —This volume includes a long and fascinating section of Alphabets des Langues modernes & anciennes.
Better scan at Archive.org.

Manual de la Typografia Española, o sea el Arte de la Imprenta. Por Antonio Serra y Oliveres. Madrid: D. Eduardo Oliveres, 1852.

The American Printer: A manual of typography, containing practical directions for managing all departments of a printing office, as well as complete instructions for apprentices. By Thomas MacKellar. Philadelphia: MacKellar, Smiths & Jordan. —A tremendous success, published in many editions:

1867.

1874.

1878.

1883.

1885.

1887.

1889.

1893.

Le Livre de demain. By Albert de Rochas, 1884. —The Book of Tomorrow will be printed in beautiful colors on interesting paper. This book of printing samples points the way.

Harpel’s Typograph, or Book of Specimens, containing useful information, suggestions, and a collection of examples of letterpress job printing arranged for the assistance of master printers, amateurs, apprentices, and others. By Oscar H. Harpel, typographic designer and printer. Cincinnati, 1870. —Many beautiful color examples. Interesting to compare it with Le Livre de demain above: the trend toward color and decoration was worldwide, but American taste in decoration was quite different from French—more prickly, we might say.
The same, at Google Books (in lower-resolution scans).

Tipografia. Salvatore Landi. Milano: Ulrico Hoepli, 1892.

I. Guida per chi stampa e fa stampare: compositori e corretoi, revisori, autori ed editori.

II. Lezioni di compositione ad uso degli allievi e di quanti fanno stampare.

Modern Type Display. A brochure containing examples of artistic type display, the same being the work of printers and print shops whose work is of merit and is duly credited and recognized herein. Chicago: The Inland Printer Company, 1900.

The Practice of Typography. By Theodore Low De Vinne. New York: The Century Company.

A Treatise on the Processes of Typemaking, the Point System, the Names, Sizes, Styles and Prices of Plain Printing Types. 1902.

A Treatise on Title-Pages, with numerous illustrations in facsimile and some observations on the early and recent printing of books. 1902.
The same, Oswald Publishing Company, 1914. —A better scan; it appears to be a reprint of the 1902 edition.

Modern Methods of Book Composition: A treatise on type-setting by hand and by machine and on the proper arrangement and imposition of pages. 1904.

Correct Composition: A treatise on spelling, abbreviations, the compounding and division of words, the proper use of figures and numerals, italic and capital letters, notes, etc., with observations on punctuation and proof-reading. 1910.

Vade-Mecum du Typographe. Par Jean Dumont. Bruxelles : Des Presses de A. Lesigne, 1915. —With many sample title pages, advertisements, cards, etc.

Lexique Typographique. Complément du Vade-Mecum du Typographe. Par Jean Dumont. Bruxelles : Imprimerie A. Leempoel, 1917. —All the important French terms defined.

The Art & Practice of Typography: A manual of American printing, including a brief history up to the twentieth century, with reproductions of the work of early masters of the craft, and a practical discussion and an extensive demonstration of the modern use of type-faces and methods of arrangement. By Edmund G. Gress. New York: Oswald Publishing Company, 1917.

The Manual of Linotype Typography. Prepared to aid users and producers of printing in securing greater unity and real beauty in the printed page. Typographical plan and critical comment by William Dana Orcutt, in co-operation with Wdward E. Bartlett, Director of Linotype Typography. Brooklyn: Mergenthaler Linotype Company, 1923.