You’re going to be scanning Henkel’s book? I would so appreciate a scanned copy if that was made available 
It’s going to take some time … and new scanning equipment (and graphic/material updates, etc.) The book will be available for free on my website along with the other free publications. www.electrologynow.com
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The recording are on my website listed under Hinkel lectures … on the home page www.electrologynow.com