For more details on how to distinguish popular, trade and scholarly journals, see: Popular vs Trade vs Scholarly Journals. See also Evaluation Clues for Articles Taken from the Web.
Edison Temperature Yesterday. Maximum temperature yesterday: 34 Â°F (at 1:51 pm) Minimum temperature yesterday: 25 Â°F (at 6:51 am) Average temperature yesterday: 29 Â°F. High & Low Weather Summary for the Past Weeks
Edison's greatest contribution was the first practical electric lighting. He not only invented the first successful electric light bulb, but also set up the first electrical power distribution company. Edison invented the phonograph, and made improvements to the telegraph, telephone and motion picture technology.