I want to know the answer to the following question:
What was the name of the discs Edison introduced in 1909?
All the background I'm provided with is that "Despite these improvements, during the 1910s discs decisively won this early format war, although Edison continued to produce new Blue Amberol cylinders for an ever-dwindling customer base until late in 1929.". Is that enough to answer the question?
Answer: yes