-- Sir David Brewster's improved stereoscope applied to photography.
1851. "Photography, a Treatise on the Chemical Changes produced by Solar Radiation, and the Production of Pictures from Nature, by the Daguerreotype, Calotype, and other Photographic Processes," by Robert Hunt. Published by J. J. Griffin and Co., London and Glasgow.
1852. "Archer's Hand-Book of Collodion Process." Published May 14th. Second edition, enlarged; published 1854.
-- "Archer's Collodion _Positive_ Process." Published July 20th.
-- Fox Talbot's photo-engraving on steel process; patented October 29th.
1853. A Manual of Photography, by Robert Hunt, published.
-- Photographic Society of London founded. Sir Charles Eastlake, P.R.A., President; Roger Fenton, Esq., Secretary. First number of the Society's Journal published March 3rd.
-- Cutting's American patent for use of bromides in collodion obtained June 11th, and his Ambrotype process introduced in America.
-- "The Waxed-Paper Process," by Gustave Le Gray. Translated from the French with a supplement, by James How. Published by G. Knight and Co., Foster Lane, Cheapside.
-- Frederick Scott Archer introduced a triple lens to shorten the focus of a double combination lens.
1854. E. R., of Tavistock, published directions for the use of isinglass as a substitute for collodion.
-- First series of photographic views of Kenilworth Castle, &c., from collodion negatives, published by Frederick Scott Archer.
-- Liverpool Photographic Journal, first published by Henry Greenwood, bi-monthly.
-- First roller-slide patented by Messrs. Spencer and Melhuish, May 22nd.
-- Fox Talbot first applied albumen to paper to obtain a finer surface for photographic printing.
-- Photo-Enamel process; first patent December 13th.
-- Dry collodion plates first introduced.
1855. M. Poitevin's helioplastic process patented February 20th.
-- Dr. J. M. Taupenot's dry plate process introduced.
-- Photo-galvanic process patented June 5th.
-- "Hardwich's Photographic Chemistry." First edition, published March 12th.
-- Ferrotype process introduced in America by Mr. J. W. Griswold.
1856. "Photographic Notes." Edited by Thomas Sutton. Commenced January 1st; bi-monthly.
1856. Sutton's Calotype process, published March.