1809, the British chemist David invented the arc lamp, and mankind entered the era of using electric lamps for lighting. 1906, Edison invented the household tungsten light bulb. Since then, incandescent lamps, fluorescent lamps, energy-saving lamps, neon lights and various high-tech lamps invented by modern high-tech have mushroomed on the lighting stage, greatly facilitating people's production and life.

1863: American Alanson Crane obtained a patent for fire extinguisher. 1879: The theater in California used arc light for the first time. 1923: wilhelm rontgen, the first German scientist to win the Nobel Prize in physics, died. He discovered x-rays at 1895. 1933: new york telegraph company launches singing telegraph for the first time. 1957: styrofoam (styrofoam; I.e. foamed polyester) cooler. 196 1: The Niagara Falls hydroelectric power plant in Canada was put into operation. 1998: For the first time, someone was convicted of hate crimes in cyberspace for sending threatening emails to three Asian college students.

Every year, human inventions are climbing more dazzling peaks. When a huge laboratory called gas factory transports gas through endless underground pipelines, it begins to illuminate the factory (Baldton and Watt introduced gas lamps in 1798, and Phillips and Lee cotton mills in Manchester have been using 1000 gas lamps for a long time since 1805. ), followed by illuminating European cities (London from 1807, Dublin from 18 18, Paris from 18 19, and even remote Sydney from 18 14). ), compared with this achievement, Argandlamp (1782-1884), the first major progress since the invention of oil lamps and candles, has almost no revolutionary role in artificial lighting. At this time, arc lamps began to be known. Professor Wheatstone in London plans to connect Britain and France by submarine telegraph line. In just one year (1845), 48 million passengers took the British railway. Men and women can already run along the 3000-mile-long railway in Great Britain (1846, 1850, more than 6000 miles before). There are 9000 miles of railways in America. Regular steamboat routes have connected Europe with America, Europe and the Indies.