Video: 'Documentary | Thomas Edison - The Wizard of Menlo Park' (light bulb at 33:38; Oct. 22, 1879, at 44:35)
(Wednesday, October 22, 1879, 1:30 a.m. local time) — After 14 months of experiments, Thomas Edison invented the first practical electric incandescent lamp today at his laboratory in Menlo Park, New Jersey. Continue reading Thomas Edison invents first practical electric light bulb 140 years ago this hour #OnThisDay #OTD (Oct 22 1879)