愛迪生,作文素材

篇一：GRE寫作備考素材之愛迪生(一)

如果您想要在GRE寫作考試中遊刃有餘，就一定要在備考中積累很多的寫作素材，下面小編就給大傢提供一些GRE寫作備考素材之愛迪生，供大傢參考。

The Edison Company produced over 1,700 movies. Synchronizing movies with the phonograph in 1904, Edison laid the basis for talking pictures. In 1908 his cinemaphone appeared, adjusting film speed to phonograph speed. In 1913 his kinetophone projected talking pictures: the phonograph, behind the screen, was synchronized by ropes and pulleys with the projector. Edison produced several "talkies." Meanwhile, among other inventions, the universal motor, which used alternating or direct current, appeared in 1907; and the electric safety lantern, patented in 1914, greatly reduced casualties among miners. That year Edison invented the telescribe, which combined features of the telephone and dictating phonograph.

During World War I, Edison headed the U.S. Navy Consulting Board and contributed