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Learn about what happened in business in today's past

August 27th:

1878: The day after he returns to his laboratory in Menlo Park, N.J., from a trip to St. Louis, Thomas Alva Edison begins experimenting with electric light. By the middle of September (the final date is uncertain), Edison has solved the problem of creating incandescent light.
Source: http://edison.rutgers.edu/chron1.htm#78