Resources
History
American Museum of Natural History
Exploring Leonardo
Scientist, Inventor, Artist
Why is the Mona Lisa Smiling?.

The Empirical Gas Laws and the Thermometer
Measuring Friction on an Atomic Level (disproving Amontons' Law)
The optical telegraph

The Growth of the Steam Engine.

The Grandfather of soil mechanics
Coulomb's Law
Coulomb Force

Teflon
http://www.net-master.net/~ptfedave
http://www.psrc.ums.edu/macrog/ptfe.html
http://www.fietz.de/ptfe_phe.htm.

Ice
http://www.exploratorium.edu/hockey/skating1.html