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Thomas Alva Edison Until the late 1800s, most people went to bed soon after sunset. They used candles and oil or gas lamps for light. American inventor Thomas Edison changed the way people live when he invented the first practical light bulb. The light bulb was just one of more than 1.000 inventions created by one of the greatest inventors of all time. The period from 1879 to 1900, when Edison produced and perfected most of his devices, has been called the Age of Edison. Thomas Alva Edison was born in Milan, Ohio, in 1847. In 1854 the family settled in Port Huron, Michigan, where Edison attended school for three months. This was his only formal public education. His mother continued his education, teaching him reading, writing, and arithmetic. Edison earned a job selling newspapers, apples, and candy on the Detroit and Port Huron branch of the Grand Trunk Railroad when only 12 years old. Around this time his hearing began to decline, possibly due to a childhood attack of scarlet fever. When 15 years old, while still working on th railroad, Edison bought a small second hand printing press and soon began producing a newspaper, the Weekly Herald, which he printed, edited, and sold on the Grand Trunk Railroad. In 1862, Edison saved a boy from being run over by a train. The boy's father operated a telegraph machine, which sent coded messages over wire. As thanks, the father taught Edison how to operate the telegraph. Edison then made improvements to the telegraph. He earned money from his inventions. In 1876, Edison started the first industrial research laboratory at Menlo Park, New Jersey. He worked very hard. He lived in his laboratory and became rich from his inventions. Edison's greatest inventions included an improved telephone, the phonograph, the motion-picture camera, and electric storage batteries. He is best remembered for inventing a long-lasting light bulb. In the 1879, many inventors were trying to make a practical light bulb. Edison tried hundreds of schemes. Finally he found a filament (thin thread) made of carbon. An electric spark made the filament glow inside a glass tube. Edison's incandescent lamp was a great success. It burned steadily for more than 40 hours. Edison wanted people to have electric light in their homes. So he built the first electric power plants. People liked Edison because he was a down-to-earth man. His favourite saying was, “Genius is 1 percent inspiration and 99 percent perspiration." What is the purpose of the text?

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