Ladies' Portmanteaus, DESPATCH-BOXES, WRITING-DESKS, DRESSING-CASES, and other travelling requisites, Gratis on application, or sent free by Post on receipt of Two Stamps. MESSRS. ALLEN'S registered Despatch-box and Writing-desk, their Travelling-bag with the opening as large as the bag, and the new Portmanteau containing four compartments, are undoubtedly the best articles of the kind ever produced. J. W. & T. ALLEN, 18 & 22. West Strand. * * * * * BENNETT'S MODEL WATCH, as shown at the GREAT EXHIBITION. No. 1. Class X., in Gold and Silver Cases, in five qualities, and adapted to all Climates, may now be had at the MANUFACTORY, 65. CHEAPSIDE. Superior Gold London-made Patent Levers, 17, 15, and 12 guineas. Ditto, in Silver Cases, 8, 6, and 4 guineas. First-rate Geneva Levers, in Gold Cases, 12, 10, and 8 guineas. Ditto, in Silver Cases, 8, 6, and 5 guineas. Superior Lever, with Chronometer Balance, Gold, 27, 23, and 19 guineas. Bennett's Pocket Chronometer, Gold, 50 guineas; Silver, 40 guineas. Every Watch skilfully examined, timed, and its performance guaranteed. Barometers, 2l., 3l., and 4l. Thermometers from 1s. each. BENNETT, Watch, Clock and Instrument Maker to the Royal Observatory, the Board of Ordnance, the Admiralty, and the Queen, 65. CHEAPSIDE. * * * * * VIEWS IN LONDON. STEREOSCOPES AND STEREOSCOPIC PICTURES. BLAND & LONG, 153. FLEET STREET, OPTICIANS and PHILOSOPHICAL INSTRUMENT MAKERS, invite attention to their Stock of STEREOSCOPES of all Kinds, and in various Materials; also, to their New and Extensive Assortment of STEREOSCOPIC PICTURES for the same, in DAGUERREOTYPE, on PAPER, and TRANSPARENT ALBUMEN PICTURES on GLASS, including Views of London, Paris, the Rhine, Windsor, &c. These Pictures, for minuteness of Detail and Truth in the Representation of Natural Objects, are unrivalled. BLAND & LONG, Opticians, 153. Fleet Street, London. *** "Familiar Explanation of the Phenomena" sent on Application. * * * * * 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. * * * * * 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.