T. BAKER'S CATALOGUE of Cheap and Valuable Second-hand BOOKS, Theological and Miscellaneous: including a large Collection of OLD and MODERN DIVINITY, SERMONS, &c., may be had Gratis on application, or by Post, by sending one Penny Stamp to frank it. THOMAS BAKER. 19. Goswell Street, London. * * * * * BOOKS BOUGHT, to any Amount, and the utmost Price given, for immediate Cash, thereby saving the delay, uncertainty, and expense of Public Auction, by a Second-hand Bookseller of 20 years' standing. N.B.--Catalogues Gratis and Post Free. 20,000 Volumes of Books. Apply to T. MILLARD, 70. Newgate Street. * * * * * Now ready, price 6s. PROFESSOR HUNT'S MANUAL OF PHOTOGRAPHY. Fourth Edition revised. London and Glasgow: RICHARD GRIFFIN & CO. * * * * * TO ETHNOLOGISTS.--MESSRS. TRUEBNER & CO. are preparing for immediate Publication, in one volume, 4to., 650 pp. profusely illustrated. price 1l. 12s., GLIDDON'S TYPES OF MANKIND; or Ethnological Researches, based upon the Ancient Monuments, Paintings, Sculptures, and Crania of Races, and upon their Natural, Geographical, Philological, and Biblical History. By J. C. NOTT, M.D. and G. R. GLIDDON, formerly U.S. Consul at Cairo. Gentlemen desirous of becoming Subscribers are requested to send their Names in as early as possible. Illustrated Prospectus to be had on application. TRUEBNER & CO., 12. Paternoster Row. * * * * * Just published, with ten coloured Engravings, price 5s., NOTES ON AQUATIC MICROSCOPIC SUBJECTS OF NATURAL HISTORY, selected from the "Microscopic Cabinet." By ANDREW PRITCHARD, M.R.I. Also, in 8vo., pp.720, plates 24, price 21s., or coloured, 36s., A HISTORY OF INFUSORIAL ANIMALCULES, Living and Fossil, containing Descriptions of every species, British and Foreign, the methods of procuring and viewing them, &c., illustrated by numerous Engravings. By ANDREW PRITCHARD, M.R.I. "There is no work extant in which so much valuable information concerning Infusoria, (Animalcules) can be found, and every Microscopist should add it to his library."--_Silliman's Journal._ London: WHITTAKER & CO., Ave Maria Lane. * * * * * {366} THE MANUAL OF SCIENCE AND ARTS, AND PHOTOGRAPHIC MISCELLANY. NO. II. ON MAY 1ST, Containing Twenty-four Pages of Letterpress, Two Lithographic Plates, and Numerous Woodcuts. A Second Edition of No. I. in the Press. MONTHLY, PRICE SIXPENCE. London: WHITTAKER & CO. * * * * *