XYLO-IODIDE OF SILVER, exclusively used at all the Photographic Establishments.--The superiority of this preparation is now universally acknowledged. Testimonials from the best Photographers and principal scientific men of the day, warrant the assertion, that hitherto no preparation has been discovered which produces uniformly such perfect pictures, combined with the greatest rapidity of action. In all cases where a quantity is required, the two solutions may be had at Wholesale price in separate Bottles, in which state it may be kept for years, and Exported to any Climate. Full instructions for use. CAUTION.--Each Bottle is Stamped with a Red Label bearing my name, RICHARD W. THOMAS, Chemist, 10. Pall Mall, to counterfeit which is felony. CYANOGEN SOAP: for removing all kinds of Photographic Stains. The Genuine is made only by the Inventor, and is secured with a Red Label bearing this Signature and Address, RICHARD W. THOMAS, CHEMIST, 10. PALL MALL, Manufacturer of Pure Photographic Chemicals: and may be procured of all respectable Chemists, in Pots at 1s., 2s., and 3s. 6d. each, through MESSRS. EDWARDS, 67. St. Paul's Churchyard; and MESSRS. BARCLAY & CO., 95. Farringdon Street, Wholesale Agents. * * * * * COUNTY FIRE OFFICE, 50. REGENT STREET, and 2. ROYAL EXCHANGE BUILDINGS, LONDON.--Established 1806. _Trustees and Directors._ The Right Hon. Lord Northwick. Major-Gen. Charles Richard Fox. Sir Richard D. King, Bart. Sir Glynne Earle Welby, Bart. The Hon. Arthur Kinnaird, M.P. Frederick Squire, Esq. Henry B. Churchill, Esq. The Rev. James Sherman. The Rev. Isaac Spencer. William Henry Stone, Esq. &c. &c. &c. _Managing Director._--John A. Beaumont, Esq. The Rates of Premium charged by the County Fire Office are upon the lowest scale consistent with security to the insured. When a Policy has existed for a period of seven years, a return of 25 per cent., or one-fourth the amount of Premiums paid during that period, is declared upon such policy. The returns paid to the present time amount to nearly 200,000l. All losses are settled with promptitude and liberality. CHARLES STEVENS, Secretary. * * * * * 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. * * * * *