silk, stable location between two days. 1882, in new york pearl street block communal fire was the world`s second plant, built in new york urban electric lighting, a modern electricity system to take shape. mar lighting achievement has not only greatly improved the working conditions of production, but also herald an era of daily life electrification forthcoming. 1883, edison bulbs in a vacuum test, accidentally discovered the cold, there is a current hot electrode. this phenomenon was called the edison effect, become electron tube and electronic industries. 1887, from xiaolan government, and in the same year in a larger city, the laboratory equipment is also updated the famous edison laboratory (later known as the invention factory). here, according to g.
    school invention, produced its own camera. 1914, by gramophone and camera film produced by the first audio system. old age, his inventions and innovations including batteries, cement mixer, sound recording telephone, double - and multi-type cable system, railways used brakes. first world war, he served as chairman of the technical advisory committee to guide torpedoes and anti-submarine equipment research, invented dozens of weapons. to this end, the united states government in 1920 conferred on him the distinguished services medal serving, the french government awarded honorary medals to his corps spaces. 1928, the united states congress to grant him honorary medals. throughout their entire life cycle, edison and his laboratory received 1,093 patents for their invention. edison invented many life, but he is after all a system of scientific knowledge, and thus to the development of modern technology can not make the right judgment. in the 19th century, the exchange of transmission system has eme