Which filament-materials did Edison experimented with while making his electric-bulb?

Question

It's said that he used 999 materials for bulb-filament but then succeeded with the 1000th one. Is there a list of all or some of those materials and how did he get them?

Answer 1

according to the edison museum website, his team tested around 6,000 plant materials but discovered that carbonised bamboo seemed to work well. It also lasted for 1,200 hours

http://www.edisonmuseum.org/content.php?...