Here's some from from p. 12 of the Alley book.
The discussion goes on at length in the next paragraph. Says that 30% of what has been dug at Sistersville was Akro, 70% Alley (with a caveat that "Alley" doesn't necessarily refer to Lawrence Alley's production), and a few isolated oddballs. The Akro was mostly patches, some corks, and some oxblood. The theory is that Alley needed glass, Akro had lots of excess, and contrary to intuition, the Akro cullet was useful because if you heat glass high enough and long enough it turns clear, not the dark mess many would expect.