This instructional pamphlet from Dietzgen is the perfect tool for those interested in engineering and slide rule usage.

I actually found it going through my Godfather’s old things. I hated to throw it away as there was also a typewritten report, I assume by him, entitled “The Slide Rule or Precision Calculating Rule.”

I am including this for free and selling it at a low cost hoping someone will buy and enjoy it. Thanks for looking!