My freshman year (9th grade), my Science teacher, Mr. McDowell, had a slide rule that hung on the wall. It was huge, the kind of slide rule that JL would lust after!

He would give us problems to solve, and work out the solution on that big slide rule as fast or faster than we could with calculators.

Now that I think about Mr. McDowell, he was the kind of guy who would have used a straight razor. RIP!

RT