IMPROVEMENT IN COLLODION.--J. B. HOCKIN & CO., Chemists, 289. Strand, have, by an improved mode of Iodizing, succeeded in producing a Collodion equal, they may say superior, in sensitiveness and density of Negative, to any other hitherto published; without diminishing the keeping properties and appreciation of half tint for which their manufacture has been esteemed. Apparatus, pure Chemicals, and all the requirements for the practice of Photography. Instruction in the Art. THE COLLODION AND POSITIVE PAPER PROCESS. By J. B. HOCKIN. Price 1s., per Post, 1s. 2d. {660} * * * * * LITERARY GIFT BOOKS. THE FOLLOWING MAY NOW BE HAD:-- I. BYRON'S POETICAL WORKS. With Plates and Vignettes. 10 vols. 30s. II. BYRON'S POETICAL WORKS. Complete in One Volume, with Portrait and Vignette. 12s. III. BYRON'S POETICAL WORKS. In Eight Pocket Volumes. 20s. IV. BYRON'S CHILDE HAROLD. Illustrated by a Portrait of Ada and 30 Vignettes. 10s. 6d. V. BYRON'S LIFE AND LETTERS. With Plates and Vignettes. 6 vols. 18s. VI. BYRON'S LIFE AND LETTERS. Complete in One Volume, with Portraits and Vignette. 12s. VII. CRABBE'S LIFE AND POEMS. With Plates and Vignettes. 8 vols. 24s. VIII. CRABBE'S LIFE AND POEMS. Complete in One Volume, with Portrait and Vignettes. 10s. 6d. IX. BISHOP HEBER'S INDIAN JOURNALS. 2 vols. 10s. X. BISHOP HEBER'S POEMS. With Portrait. 7s. 6d. XI. MILMAN'S POETICAL WORKS. With Plates and Vignettes. 3 vols. 18s. XII. MILMAN'S WORKS OF HORACE. Illustrated with 300 Vignettes by Scharf. 21s. XIII. MILMAN'S LIFE OF HORACE. With Woodcuts. 9s. XIV. LOCKHART'S ANCIENT SPANISH BALLADS. 2s. 6d. XV. LOCKHART'S LIFE OF ROBERT BURNS. 3s. XVI. CROKER'S BOSWELL'S JOHNSON. Complete in One Volume. Portraits. 15s. XVII. REJECTED ADDRESSES. With Portrait and Woodcuts. 5s. XVIII. ALLAN CUNNINGHAM'S POEMS AND SONGS. With Woodcuts. 2s. 6d. XIX. SIR HUMPHRY DAVY'S CONSOLATIONS. With Woodcuts. 6s. XX. SIR HUMPHRY DAVY'S SALMONIA. With Woodcuts. 6s. XXI. HALLAM'S LITERARY ESSAYS AND CHARACTERS. 2s. XXII. BOOK OF COMMON PRAYER. With 1000 Woodcuts, Initials, and Coloured Borders. 21s. XXIII. SOUTHEY'S BOOK OF THE CHURCH. 12s. XXIV. WILKINSON'S ANCIENT EGYPTIANS. With 500 Woodcuts. 2 vols. 12s. XXV. BRAY'S LIFE OF STOTHARD. Illustrated with Portrait, and 70 Woodcuts. 21s. XXVI. THE FAMILY ARABIAN NIGHTS. Illustrated with 600 Woodcuts by Harvey. 21s. XXVII. JAMES' FABLES OF ÆSOP. With 100 Woodcuts by Tenniel. 2s. 6d. XXVIII. ESSAYS FROM "THE TIMES." 4s. XXIX. THE FAIRY RING. With Woodcuts by RICHARD DOYLE. 7s. 6d. XXX. JESSE'S COUNTRY LIFE. With Woodcuts. 6s. XXXI. JESSE'S NATURAL HISTORY. With Woodcuts. 6s. * * * * * JOHN MURRAY, Albemarle Street. * * * * *