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Early Calculating Machines: Charles Babbage mid 1800's The Difference Engine #1 (1832) The Difference Engine #2 (1852) The Analytical Engine (dev. by son in 1910) 1835-36: Texas Revolution fought to win the independence of Texas from Mexico. 1845: The potato blight strikes Ireland. 1854: Commodore Matthew Parry negotiates a treaty opening Japan to American trade. 1869: The first transcontinental railroad is completed in America. Railroad Car, Analytical Engine, Photograph of Charles Babbage, copyright National Science Foundation Mouse/Vail telegraph, copyright Smithsonian Institution Ada Lovelace, Ada Programming Language, copyright the Ada Picture Gallery Calendar of Events, copyright the National Women's Hall of Fame Painting, Artist: Jean-Baptiste Camille Corot, copyright Mark Harden's Artchive http://www.artchive.com Michelle Symonds