On This Day December 31

Thomas Edison made the first public demonstration of his incandescent light bulb on December 31 1879, in Menlo Park. British chemist Joseph Swan had already invented the lamp but Edison wanted to produce a longer lasting one. The American inventor worked thousands of hours on the electric light bulb experimenting with 1,200 different varieties of bamboo before finding a carbonized bamboo fiber that remained lit for over 1,000 hours in a vacuum.

"Edison Lightbulb Museum of Letters and Manuscripts" by Tieum512 

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