I'm currently reading The Wizard of Menlo Park, a biography of Thomas Alva Edison. I was astonished to see different type of filaments that were used during the experiments. The carbon filament included "cotton and linen thread, wood splints, papes. Edison's team later discovered a carbonized bamboo filament that could last over 1200 hours.
The inscandescent light bulb was invented in 1840 by British scientist Warren de la Rue. That time, electric light bulb was not invented. Edison was not born until February 11, 1947 and didn't start to experiment with the electric light bulb until around 1879. The successful experiment was on October 22, 1879.
The electric light bulb didn't become common for homes until 1920's.
I'm enjoying the book tremendously.
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