one of the earliest photographic processes, in which the image was produced on iodine-sensitized silver and developed in mercury vapour
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
the first commercially developed and widely used photographic process, now only of historical interest. The daguerreotype was invented in the 1830’s by L. J. Daguerre on the basis of experiments by N.Niepce. Information on the invention of the daguerreotype was made public in 1839, which is regarded as the year of the invention of photography.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
A photograph produced on a silver plate or a copper plate coated with silver sensitized by the action of iodine; after exposure of the plate in a camera, a latent image is developed by use of mercury vapor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.