=The Book.=—As pointed out by Alfred W. Pollard in his article on the Book, there is but a slight difference in general appearance between a manuscript written in a formal book-hand and an early printed copy of the same work printed in the same district as the manuscript had been written. The type used by the early printers was as a rule based on handwriting considered appropriate for use in a manuscript copy of the same work. The development of the colophon into the title-page (a subject on which Mr. Pollard is an authority) is briefly summarized. Other characteristics of some of the early printed books, such as their size, their paper, their illustrations and their bindings are noted. The main features of the books of each century from the 16th to the 19th are succinctly characterized in separate paragraphs, and the comparative cost of books at various periods is illustrated by citations of prices of well known works. =Incunabula.=—Another article by Mr. Pollard treats of Incunabula. After summarizing the researches in this field the author grants that it is literally true that the output of the 15th century presses is better known to students than that of any other period. The subject has been pursued with what some have thought to be excessive and misplaced zeal. American librarians are naturally not so much interested in incunabula as are their European brethren, but our larger libraries and especially our universities are coming to have a fair representation of the work of some of the early printers and one notable collection, that made by Dr. Copinger, has come to this country, having been presented to the Philadelphia Free Library by Mr. P. A. B. Widener. =Printing.=—The article on Printing by C. T. Jacobi, the author of a practical treatise on the subject which has gone through four editions, is confined to the work of the printing press and is divided into two parts: (1) history of the printing press and (2) modern presses. Those who do not have a mechanical bent will probably not get much out of these sections, but towards the end of the article is some general information on printing which ought to prove of interest to every library assistant.