1800 - 1900

1812 October 8: John Benjamin Dancer born in London.
1819 March 17: Rene Prudent Patrice Dagron born in Beauvoir, Sarthe, France.
1826-27   Niepce produces the world's first camera photograph from nature.
1835 February: Fox-Talbot makes first permanent paper contact prints from negatives.
1839 January 7: Announcement made to the French Academy of Sciences that Daguerre has perfected a practical method of photography named the daguerrotype.
  Autumn: Dancer makes first microphotograph on a daguerrotype plate at 160X reduction.
1852 February: Dancer makes collodion microfilms.
1853 March 3: Rosling shows microfilm of a newspaper before the Photographic Society of London.
  May 21: Notes and Queries publishes numerous suggestions for library microfilming.
  July 9: Athenaeum publishes letter on Herchel's "old idea" for microfilming reference materials.
  Autumn: Sidebotham produces microfilms by Dancer's instructions.
1854 January 28: Notes and Queries describes Diamond's microfilm of Fifteenth Century manuscript.
  Early March: Shadbolt makes microfilms 5/8 mm in size.
  March 29: Shadbolt puts first consignment of 24 microfilms for sale.
1855 September: Taupenot publishes details of the collodio-albumen process and the first practical dry collodion plate. This is the process Dagron used.
1856 Spring: Dancer shows his novelty microfilms to Sir David Brewster.
1856-57 Winter: Brewster shows Dancer's microfilms in Italy and France. Suggests their use in jewelry and trinkets and for espionage purposes.
1857 September: Microfilms by Dancer and Bertsch exhibited before The British Association for the Advancement of Science.
  November 5: Shadbolt publishes his claim to invention of micro filming, based on his 1854 work.
1859 May 15: Shadbolt publicly acknowledges Dancer's priority of microfilm experiments.
  June 21: Dagron receives world's first microfilm patent for "a novelty microscope giving an illusion of depth".
  _______: Microfilms exhibited at the Paris Photographic Salon were "the marvels of the Exposition".
1862 Summer: Dagron exhibits microfilms at the London World's Fair, receives Honorable Mention; presents a set to Queen Victoria.
  _______: Dagron publishes his "Cylindres photo-microscopiques montes et non-montes sur bijoux, brevetes en France et a l'etranger".
1863 October 12: Col. Pike publishes his experiments with the Dagron process in America.
1864 January: Brewster addresses the Photographic Society of Scotland on the Dagron process.
  _______: Dagron publishes his "Traite de Photographie Micro scopique". Gives details of his process and price list of his equipment and supplies. This is the world's first book on microfilming techniques.
  _______: John H. Morrow opens the first American commercial microfilm laboratory.
1865 _______: Simpson proposes publication of books on microfilm.
1867 Summer: Dagron wins Honorable Mention at Paris World's Fair.
1870 July 19: Emperor Napoleon III declares war on Prussia.
  September: Prussians surround Paris and cut last communication with unoccupied France.
  November 10: Central government in Paris signs contract with Dagron And Fernique to produce official microfilm dispatches.
  November 12: Dagron and Fernique leave Paris by balloon No. 27, the Niepce.
  November 21: Dagron arrives in Tours.
  November 29: Delegation finally authorizes Dagron to replace the microprint service of Blaise with his own improved microprint service.
  December 5: Dagron makes first official microfilm dispatches.
1871 January 28: Paris and Free France surrender: Dagron has delivered 115,000 messages to Paris by pigeon.
  April: Pigeon post microfilms offered for sale in U.S.A.
  Summer: Dagron reproduces 130,400 letters on a microfilm frame 0.5mm square.
  Summer: Dagron publishes his "La Poste par pigeons voyageurs".
1876 Summer: Many microfilms in trinkets shown at Centennial Exposition in Philadelphia.
1878 Summer: Dagron receives Silver Medal at Paris World's Fair.
1887 March Journal of the Franklin Society in Philadelphia announces that The Century Company, publishers of encyclopedias, has microfilmed over 25,000 page proofs on frames 1 " x 2" in size for protection against loss and "the greatest convenience in storage and handling".
  Summer Dagron publishes a lengthy description of his method of processing microfilm in the Philadelphia Photographer and The Camera.
  November 24: John Benjamin Dancer dies in Manchester at age 75.
1889 Summer: Eastman begins manufacture of nitrocellulose film.
  September 2: Thomas Edison establishes 35mm as the first standard film gauge for nitrocellulose film and buys his first motion picture film from the Eastman Company.
1891 March 17: Madsen receives U.S. Patent No. 448,447 on a microfilm camera.
1900 August 14: Jansen, Gardiner and Kandler receive U.S. Patent No. 655,977 on a check microfilming camera.
  June 13: Rene Prudent Patrice Dagron dies in Paris at age 81.