October 21st, 1879
Using a filament of carbonized thread, Thomas Edison tests the first practical electric incandescent light bulb (it lasted 13? hours before burning out). event on October 21, 1879. Read about how to open files in Open File Database.
Events around October 21, 1879
October 21st, 1879 | Event | Using a filament of carbonized thread, Thomas Edison tests the first practical electric incandescent light bulb (it lasted 13? hours before burning out). |
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