BLAND & LONG, Opticians, Philosophical and Photographical Instrument Makers, and Operative Chemists, 153. Fleet Street. * * * * * PHOTOGRAPHY.--HORNE & CO.'S Iodized Collodion, for obtaining Instantaneous Views, and Portraits in from three to thirty seconds, according to light. Portraits obtained by the above, for delicacy of detail rival the choicest Daguerreotypes, specimens of which may be seen at their Establishment. Also every description of Apparatus, Chemicals, &c. &c. used in this beautiful Art.--123. and 121. Newgate Street. * * * * * PHOTOGRAPHIC PAPER.--Negative and Positive Papers of Whatman's, Turner's, Sanford's, and Canson Freres' make. Waxed-Paper for Le Gray's Process. Iodized and Sensitive Paper for every kind of Photography. Sold by JOHN SANFORD, Photographic Stationer, Aldine Chambers, 13. Paternoster Row, London. * * * * * 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. * * * * * PHOTOGRAPHIC CAMERAS.--OTTEWILL'S REGISTERED DOUBLE-BODIED FOLDING CAMERA, is superior to every other form of Camera, for the Photographic Tourist, from its capability of Elongation or Contraction to any Focal Adjustment, its extreme Portability, and its adaptation for taking either Views or Portraits. Every Description of Camera, or Slides, Tripod Stands, Printing Frames, &c., may be obtained at his MANUFACTORY, Charlotte Terrace, Barnsbury Road, Islington. New Inventions, Models, &c., made to order or from Drawings. * * * * * Now ready, price 4s. 6d. By Post, 5s. THE PRACTICE OF PHOTOGRAPHY. A Manual for Students and Amateurs. By PHILIP DELAMOTTE, F.S.A. Illustrated with a Photographic Picture taken by the Collodion Process. This Manual contains much practical information of a valuable nature. JOSEPH CUNDALL, 198. New Bond Street. * * * * * {356} MURRAY'S HANDBOOKS FOR TRAVELLERS IN ITALY. The following are now ready. HANDBOOK FOR NORTH ITALY.--Being a Guide to SARDINIA, LOMBARDY, VENICE, PARMA, PIACENZA, MODENA, LUCCA, FLORENCE, and TUSCANY as far as the VAL D'ARNO. With Maps and Plans. Post 8vo. 9s. II. HANDBOOK FOR CENTRAL ITALY. Part I.--Being a Guide to SOUTHERN TUSCANY and the PAPAL STATES. With Maps and Plans. Post 8vo. 7s. III. HANDBOOK FOR CENTRAL ITALY. Part II.--Being a Guide to ROME and its Environs. With Plan, Post 8vo. (Nearly Ready.) IV.