PHOTOGRAPHIC CORRESPONDENCE:--Box Sawdust for Collodion-- Proportions of Chlorides and Silver--Photographic Copies of Rembrandt--Coloured Photographs 358 REPLIES TO MINOR QUERIES:--Dr. Eleazar Duncon--Christian Names--Abigail--"Begging the question"--Russian Emperors-- Garble--Electric Telegraph--Butler's "Lives of the Saints"-- Anticipatory Use of the Cross--The Marquis of Granby, &c. 359 MISCELLANEOUS:-- Books and Odd Volumes wanted 362 Notices to Correspondents 362 * * * * * 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. * * * * * Just published, 18 mo., _1s._ SERMONS FOR WAYFARERS. Dedicated by permission to the Lord Bishop of Ripon, with a prefatory Epistle to the Rev. Dr. Hook. By the REV. A. GATTY. London: GEORGE BELL, 186. Fleet Street. * * * * * ARCHAEOLOGY OF THE STREETS OF DUBLIN, and CELTIC RECORDS OF IRELAND, ETC. For the Series of Papers illustrating the above, see Vols. I. II. and III. of the "Irish Quarterly Review." Price, bound, 11s. each. London: SIMPKIN & CO. Dublin: W. B. KELLY. * * * * * CATALOGUE OF VERY RARE BOOKS.--EMANUEL MAI, Bookseller of Berlin, has just published a Catalogue of PRECIOUS MANUSCRIPTS, INCUNABULA, and very rare Books on Theology, Philosophy, Antiquities, Philology, Education, the Fine Arts, Bibliography, Numismatics, Engravings, and General Literature. The Catalogue contains 17,708 Numbers, or 80,000 Volumes, and is systematically arranged with Bibliographical Notices. The Catalogue will be forwarded, Post paid, to those who will forward 2s. in Postage Stamps to MR. FRANZ THIMM, Foreign Bookseller, 3. Brook Street, New Bond Street, London. * * * * * Post Free. THE CATTLE UPON A THOUSAND HILLS. A List of GREAT OLD ENGLISH BOOKS for Sale, by JOHN TUPLING, 320. Strand. * * * * * CHEAP BOOKS.--C. HILL'S CATALOGUE, No. 13., just published, including a long Article on NAPOLEON. Sent Free on Application. 14. KING STREET, HOLBORN. * * * * *