Thanks for sharing that Gordon!
 

Hi Gordon,

> It wasn't plumbing, diesel repair, or the
> carpenter's guide. The SELF-IMPROVEMENT
> course they published for over 100 years
> was...

> MATHEMATICS MADE EASY...A Complete Home
> Study Course.

Wow, Gordon, thanks for sharing this! I had no idea that math could actually sell....

Thanks, this was a great post for me. :)

- Dien