Al, I don't see a problem with Ron's post or McCullough's remarks.. That's really what happened. What did not happen was scraping the furnace and making marbles from the scrapings. That is the myth. I bought some early in collecting and was told they were furnace scrapings. It's in some books that they are. That myth has caused the confusion. It was a tall tale told by a glass worker. Howard Powell has given me many "furnace marbles", but he knew what they were and were not. This got discussed several years back, but I guess nobody ever wrote in a book what really happened. Many people still believe the myth.
The story about Wissmach is true Al, just like Ron said.