PHOTOGRAPHIC CAMERAS.--OTTEWILL & MORGAN'S Manufactory, 24. & 25. Charlotte Terrace, Caledonian Road, Islington. OTTEWILL'S Registered Double Body Folding Camera, adapted for Landscapes or Portraits, may be had of A. ROSS, Featherstone Buildings, Holborn: the Photographic Institution, Bond Street: and at the Manufactory as above, where every description of Cameras, Slides, and Tripods may be had. The Trade supplied. * * * * * 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. * * * * * 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. * * * * * PHOTOGRAPHIC INSTITUTION. THE EXHIBITION OF PHOTOGRAPHS, by the most eminent English and Continental Artists, is OPEN DAILY from Ten till Five. Free Admission. £ s. d. A Portrait by Mr. Talbot's Patent Process 1 1 0 Additional Copies (each) 0 5 0 A Coloured Portrait, highly finished (small size) 3 3 0 A Coloured Portrait, highly finished (larger size) 5 5 0 Miniatures, Oil Paintings, Water-Colour, and Chalk Drawings, Photographed and Coloured in imitation of the Originals. Views of Country Mansions, Churches, &c., taken at a short notice. Cameras, Lenses, and all the necessary Photographic Apparatus and Chemicals, are supplied, tested, and guaranteed. Gratuitous Instruction is given to Purchasers of Sets of Apparatus. PHOTOGRAPHIC INSTITUTION, 168. New Bond Street. * * * * * PHOTOGRAPHIC APPARATUS, MATERIALS, AND PURE CHEMICAL PREPARATIONS. KNIGHT & SONS' Illustrated Catalogue, containing Description and Price of the best forms of Cameras and other Apparatus. Voightlander and Son's Lenses for Portraits and Views, together with the various Materials, and pure Chemical Preparations required in practising the Photographic Art. Forwarded free on receipt of Six Postage Stamps. Instructions given in every branch of the Art.