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1825 Chronokey Chronomedia index
Numbers after entries link to the list of references.


links and notes
•  ThaumatropeJohn Ayrton Paris, an English doctor, invents and produces a commercial version of his Thaumatrope, in which two images on either side of a disc of card threaded with string appear to merge when spun quickly.  
1826 Chronokey  
January 7  Design for a gas-light night telegraph is published in Mechanics' Magazine. Combinations of six lamps arranged in a triangle represent letters of the alphabet. The lamps are turned on and off by means of a set of taps controlling the flow of mains gas, which is ignited by a small constant pilot light in each lamp. The idea is not known to have been implemented.  
1827 Chronokey  
•  In France, Dr J N Ničpce makes photographs on metal plates.
 
•  Law of resistance and potential in electrical currents, relating current and voltage, is defined by George S Ohm (1787-1854).  
•  Louis Hachette (1800-1864), left, buys the Brédif bookstore in Paris as the basis for a publishing and bookselling business.  
1828 Chronokey  
•  The Rhine from Mainz to Cologne, first of the guide books by Karl Baedeker, is published.  
•  The Spectator weekly paper is founded in London.  
•  Construction begins on the first US passenger railroad, from Baltimore to Ohio, for Charles Carroll, then the richest man in America.  
•  A system for communicating at a distance by musical notes (called a telephone) is invented by Sudré.  
1829 Chronokey  
•  British book trade imposes retail price controls.  
•  Patent is granted to William B Burt of Detroit for the Typographer, the first US typewriter patent.  
•  Louis Jacques-Mandé Daguerre (1789-1851) and J N Ničpce form a partnership to develop photographic inventions. They work together until 1833.  
•  Leopoldi Nobili invents the galvanometer.  
•  Belgian Joseph-Antoine Plateau (1801-1883) writes his first theories about the persistence of vision.  

 

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Page updated 14 November 2008
© David Fisher