Drew, several issues:
1. You identified an English steel maker named Titanic. Is this company the source of Parker Titanic barrels?
2. You identified several Krupp barrels. Lefever used Krupp barrels, but of which Krupp steel?
3. There has long been debate in the Parker community about whether Parker fluid steel grades were truly different or if the grade steels were the same and marketing was the difference. Your paper shows different compositions for Trojan, Vulcan, Parker Steel and Titanic. I think that settled that long standing question, agree ?
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