17. _Libraries of Constantinople._--This city possesses thirty-two public libraries, all varying in extent, but more or less celebrated for the number and value of their manuscripts, which are neatly bound in red, green, or black morocco. The Mohammedans have a peculiar method of indorsing, placing, and preserving their books. Each volume, besides being bound in morocco, is preserved from dust in a case of the same material; and on it, as well as on the edges of the leaves, the title is written in large and legible characters. The books are placed, one upon another, in presses ornamented with trellis-work, and are disposed along the wall, or in the four corners of the library. All these collections are open to the public throughout the year, excepting on Tuesdays and Fridays: the librarians are as polite and attentive as Turks can be to those whom curiosity or love of study attract thither: and every one is at liberty not merely to peruse, but to make extracts from the books, and even to transcribe them entirely, provided this be done within the walls of the library. Theology, including the Koran and commentators thereon, jurisprudence, medicine, ethics, and history, are the sciences chiefly cultivated by the Osmanlis. The books are all written with the greatest care on the finest vellum, the text of each page is inclosed in a highly-ornamented and gilt framework, the beginning of each chapter or section is splendidly illuminated, and the value of the manuscripts varies in proportion to the beauty of the characters.