Someone posted a link to this article in an old Popular Science magazine. I finally got around to making a PDF file. But, I can't figure out how to make it available. So, try this link.
https://www.dropbox.com/s/eee02zwy93rrrqt/Pipe%20Making.pdf?dl=0
The link works for me, but it is in my dropbox.
https://www.dropbox.com/s/eee02zwy93rrrqt/Pipe%20Making.pdf?dl=0
The link works for me, but it is in my dropbox.