John 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
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
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In France, Dr J N Ničpce makes photographs on metal plates.
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Law of resistance and potential in electrical currents, relating current and voltage, is defined by George S Ohm (1787-1854).
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Louis Hachette (1800-1864), left, buys the Brédif bookstore in Paris as the basis for a publishing and bookselling business.
1828
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The Rhine from Mainz to Cologne, first of the guide books by Karl Baedeker, is published.
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The Spectator weekly paper is founded in London.
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Construction begins on the first US passenger railroad, from Baltimore to Ohio, for Charles Carroll, then the richest man in America.
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A system for communicating at a distance by musical notes (called a telephone) is invented by Sudré.
1829
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British book trade imposes retail price controls.
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Patent is granted to William B Burt of Detroit for the Typographer, the first US typewriter patent.
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Louis Jacques-Mandé Daguerre (1789-1851) and J N Ničpce form a partnership to develop photographic inventions. They work together until 1833.
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Leopoldi Nobili invents the galvanometer.
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Belgian Joseph-Antoine Plateau (1801-1883) writes his first theories about the persistence of vision.
Chronomedia index
John 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.
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.
Louis Hachette (1800-1864), left, buys the Brédif bookstore in Paris as the basis for a publishing and bookselling business.