This article isn't filled with as much detail as I had hoped. It is a photo-essay and doesn't really cover much in the way of the gadgets he invented and used.
Here's something Jefferson and geeky. He came up with the term 'catenary' as in a catenary curve. The Gateway Arch in St. Louis (located in the Jefferson National Expansion Park) is a catenary and you can see its equation in the visitor center at the base.
