Sole Agents in the United Kingdom for VOIGHTLANDER & SON'S celebrated Lenses for Portraits and Views. General Depot for Turner's, Whatman's, Canson Freres', La Croix, and other Talbotype Papers. Pure Photographic Chemicals. Instructions and Specimens in every Branch of the Art. GEORGE KNIGHT & SONS, Foster Lane, London. * * * * * PHOTOGRAPHY.--Collodion (Iodized with the Ammonio-Iodide of Silver)--J. B. HOCKIN & CO., Chemists, 289 Strand, were the first in England who published the application of this agent (see _Athenaeum_, Aug. 14th). Their Collodion (price 9d. per oz.) retains its extraordinary sensitiveness, tenacity, and colour unimpaired for months; it may be exported to any climate, and the Iodizing Compound mixed as required. J. B. HOCKIN & CO. manufacture PURE CHEMICALS and all APPARATUS with the latest Improvements adapted for all the Photographic and Daguerreotype processes. Cameras for Developing in the open Country. GLASS BATHS adapted to any Camera. Lenses from the best Makers. Waxed and Iodized Papers, &c. * * * * * CLERICAL, MEDICAL, AND GENERAL LIFE ASSURANCE SOCIETY. * * * * * Established 1824. * * * * * FIVE BONUSES have been declared: at the last in January, 1852, the sum of 131,125l. was added to the Policies, producing a Bonus varying with the different ages from 241/2 to 55 per cent. on the Premiums paid during the five years, or from 5l. to 12l. 10s. per cent. on the Sum Assured. The small share of Profit divisible in future among the Shareholders being now provided for, the ASSURED will hereafter derive all the benefits obtainable from a Mutual Office, WITHOUT ANY LIABILITY OR RISK OF PARTNERSHIP. POLICIES effected before the 30th June next, will be entitled, at the next Division, to one year's additional share of Profits over later Assurers. On Assurances for the whole of Life only one half of the Premiums need be paid for the first five years. INVALID LIVES may be Assured at rates proportioned to the risk. Claims paid _thirty_ days after proof of death, and all Policies are _Indisputable_ except in cases of fraud. Tables of Rates and forms of Proposal can be obtained of any of the Society's Agents, or of GEORGE H. PINCKARD, Resident Secretary. _99. Great Russell Street, Bloomsbury, London._ * * * * * WESTERN LIFE ASSURANCE AND ANNUITY SOCIETY. 3. PARLIAMENT STREET, LONDON. Founded A.D. 1842. _Directors._ H. E. Bicknell, Esq. W. Cabell, Esq. T. S. Cocks, Jun. Esq., M. P. G. H. Drew, Esq. W. Evans, Esq. W. Freeman, Esq. F. Fuller, Esq. J. H. Goodhart, Esq. T. Grissell, Esq. J. Hunt, Esq. J. A. Lethbridge, Esq. E. Lucas, Esq. J. Lys Seager, Esq. J. B. White, Esq. J. Carter Wood, Esq. _Trustees._