as I was poking around the internet I found this study that was done in 1912 on the iron ore of Lake Superior and more specifically Wisconsin. My only point is that we all know the old straights made in the USA were made from very high quality of steel. For those who love the American blades this just seems to support that it was indeed a high quality steel. Of course we knew that already. :)
http://books.google.com/books?id=Wik...ed=0CCAQ6AEwAQ