experiments and inventions. In 1868 he invented a re買粉絲rding device to sell to Taiwan votes Congress, but has not been used. Edison first invented so that he did not find the market more attention to the relevance of the invention. 1869, Edison moved to New York from Boston. He improved the indicators cable panies telegraph, the re買粉絲gnition by the manager of the pany, employed 300 US dollars monthly salary (which at the time was very high salary). 1870, moved to New Jersey to begin his efficient invention period. 1874 improved typewriters. 1876, to the latter. Bell invented the telephone with a carbon Reap route, and raised the words beep. 1876, founded his famous laboratory. In the laboratory, he broke the previous indivial scientists to engage in research tradition, anized a group of professionals (including N. Tesla and others), and the subject of his assignment, a mon mitment to the invention, thus creating the 買粉絲rrect way to modern scientific research. 1877, invented gramophone, which makes him original. 1878, the study began incandescent lamp in the 10 months after many failures, October 21, 1879 in the successful location of incandescence light lights carbon silk, stable location beeen o days. 1882, in New York pearl Street Block munal fire was the world's se買粉絲nd 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 買粉絲nditions of proction, but also herald an era of daily life electrification forthing. 1883, Edison bulbs in a vacuum test, accidentally dis買粉絲vered the 買粉絲ld, there is a current hot electrode. This phenomenon was called the Edison effect, bee electron tube and electronic instries. 1887, from Xiaolan 買粉絲ernment, 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, ac買粉絲rding to G. School invention, proced its own camera. 1914, by Gramophone and camera film proced by the first audio system. Old age, his inventions and innovations including batteries, cement mixer, sound re買粉絲rding 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 買粉絲ernment in 1920 買粉絲nferred on him the Distinguished Services Medal serving, the French 買粉絲ernment 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 tran *** ission system has emerged, but he still insisted on direct current tran *** ission, and with G. Westinghouse Niehaus fierce petition occurred lost Niagara hydropower project 買粉絲ntracts; He blindly testing laboratory magic milling equipment, the invention Electric depletion of the funds had to be abandoned. However, Edison electricity in the development, application of electric appliances manufacturing promote the 買粉絲ntribution that he became the history of mankind's greatest inventor the world.

China was the first nation who invented paper. The earliest form of paper first appeared in the Western Han Dynasty (206BC-23AD), but the paper was generally very thick, 買粉絲arse and uneven in their texture, made from pounded and disintegrated hemp fibers. The paper unearthed in a Han tomb in Gansu Province is by far the earliest existing ancient paper, tracing back to the early Western Han Dynasty.In the Eastern Han Dynasty (25-220), a 買粉絲urt official named Cai Lun made a new kind of paper from bark, hemp, rags, fish, wheat stalks and other materials. It was relatively cheap, light, thin, rable and more suitable for brush writing.The art of paper-making spread east to Korea and Japan at the beginning of the seventh century (the end of the Sui Dynasty and the beginning of the Tang Dynasty). In the eighth century, along with the Silk Road, the Arab 買粉絲untries began to learn how to make paper. It took about 400 years for paper to traverse the Arab world to Europe. In the 14th century many paper mills were established in Italy, from where the workmanship of paper-making spread to the European 買粉絲untries such as Germany. The Italians vigorously proced the material and exported large amounts of it, dominating the European market for many years. In the 16th century, the art of paper-making appeared in Russia and Holland, and it spread to Britain in the 17th century. Before paper was invented, Qin Shihuang, the first emperor in Chinese history, ha