For a little amusement, check out the following on a little history of atmospheric thermodynamics.
You might enjoy this short read on the Laws of Thermodynamics.
A Useful Website that contains further definitions of State Variables as well as discusses reversible and irreversible processes.
Wikipedia link on surface tension (for example images)
Sample youtube videos of pendant and sessile drop analyses
Sample paper on pendant drop method for measuring interfacial properties
Several images of ice crystals