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lunes, 9 de diciembre de 2013

Thomas Edison

                               THOMAS ALVA EDISON

Thomas Alva Edison was born in Milan,Ohio,February 11, 1847. He was a  businessman and an American inventor.He developed many devices that greatly influenced life around the world,
Edison developed hearing problems at an early age. The cause of his problems has been attributed to a bout of scarlet fever during childhood,Around the middle of his career, Edison attributed the hearing problem to being struck on the ears by a train conductor when his chemical laboratory in a boxcar caught fire.
He invented a lot of things:

Phonograph: The phonograph  is a device  introduced in 1877 for the recording and reproduction of sound recordings.






Electrical telegraph: An electrical telegraph is a telegraphy that uses electrical signals, usually conveyed via telecommunication lines or radio.





Alkaline batteries:Alkaline batteries are a type of primary batteries dependent upon the reaction between zinc and manganese dioxide.







Incandescent light bulb: An incandescent light bulb is an electric light which produces light with a filament wire heated to a high temperature by an electric current passing through it.






I think that Thomas Alva Edison was one of the most important inventors in all the world.



By: Francisco Baños Hernández










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