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.
THE COLLODION AND POSITIVE PAPER PROCESS. By J. B. HOCKIN. Price 1s., per Post, 1s. 2d.
SPECTACLES.—Every Description of SPECTACLES and EYE-GLASSES for the Assistance of Vision, adapted by means of Smee's Optometer: that being the only correct method of determining the exact focus of the Lenses required, and of preventing injury to the sight by the use of improper Glasses.
BLAND & LONG. Opticians, 153. Fleet Street, London.
ALLEN'S ILLUSTRATED CATALOGUE, containing Size, Price, and Description of upwards of 100 articles consisting of PORTMANTEAUS, TRAVELLING-BAGS, 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.