BLAND & LONG, Opticians, Philosophical and Photographical Instrument Makers, and Operative Chemists, 153. Fleet Street. * * * * * 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. * * * * * 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. * * * * * ESTABLISHED 1841. MEDICAL, INVALID AND GENERAL LIFE OFFICE, 25. PALL MALL. During the last Ten Years, this Society has issued more than _Four Thousand One Hundred and Fifty Policies_-- Covering Assurances to the extent of _One Million Six Hundred and Eighty-seven Thousand Pounds, and upwards_-- Yielding Annual Premiums Amounting to _Seventy-three Thousand Pounds_. This Society is the only one possessing Tables for the Assurance of Diseased Lives. Healthy Lives Assured at Home and Abroad at lower rates than at most other Offices. A Bonus of 50 per cent. on the premiums paid was added to the policies at last Division of Profits. Next Division in 1853--in which all Policies effected before 30th Junes, 1853, will participate. Agents wanted for vacant places. Prospectuses. Forms of Proposal, and every other information, may be obtained of the Secretary at the Chief Office, or on application to any of the Society's Agents in the country. F. G. P. NELSON, Actuary C. DOUGLAS SINGER, Secretary. * * * * * 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 Frères' make. Waxed-Paper for Le Gray's Process. Iodized and Sensitive Paper for every kind of Photography.