Monday, January 9, 2012

Louis Daguerre in 1844 by Jean-Baptiste Sabatier-Blot

Description: Daguerreotype of Louis Daguerre in 1844 by Jean-Baptiste Sabatier-Blot (1801 - 1881) Date: 1844. Author: Jean-Baptiste Sabatier-Blot (1801 - 1881) Source: This daguerreotype is in the collection of George Eastman House, International Museum of Photography and Film.

January 9, 1839 – The French Academy of Sciences announced the daguerreotype photographic process, named after its inventor, French artist and chemist Louis Daguerre

Daguerreotype. The name given to the first successful attempt at photography, in honor of the inventor, Louis Daguerre (1789-1851). This process was perfected in 1839, and consists of a copper plate silvered, and covered, by the action of the vapor of iodine, with a thin film of iodide of silver. By means of the action of light on this iodide of

silver, at the focal point of the camera obscura, a picture of the object is formed on the plate. This result is afterwards "developed" by means of vapor of mercury, and "fixed" by treatment in a solution of sodium hyposulphite. In recognition of the importance of his discovery, the French government awarded to Daguerre a life pension of 6000 francs. See Camera Obscura.

This Image (or other media file) is in the public domain because its copyright has expired. This applies to the United States, where Works published prior to 1978 were copyright protected for a maximum of 75 years. See Circular 1 "COPYRIGHT BASICS" PDF from the U.S. Copyright Office. Works published before 1923 in this case 1844, are now in the public domain.

This file is also in the public domain in countries that figure copyright from the date of death of the artist (post mortem auctoris in this case Jean-Baptiste Sabatier-Blot (1801 - 1881) and that most commonly runs for a period of 50 to 70 years from December 31 of that year. +sookie tex

TEXT CREDIT: 5000 facts and fancies: a cyclopaedia of important, curious, quaint, and unique information in history, literature, science, art, and nature ... Author: William Henry Pinkney Phyfe/ Publisher: G. P. Putnam's sons, 1901. Original from: the University of Michigan. Digitized: Oct 21, 2010. Length: 816 pages. Subjects: Reference › Encyclopedias, Encyclopedias and dictionaries, Reference / Encyclopedias, Reference / Yearbooks & Annuals.

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