Capillarity and Wetting Phenomena : Drops, Bubbles, Pearls, Waves (2004. XV, 291 p. w. 177 figs. 24,5 cm)

As I rush into my car under a pelting rain, my attention is caught by small drops stuck on my windshield. I also notice larger drops rolling down and others larger still that, like snails, leave behind them a trail of water. I ask myself what the difference is between these rolling drops and grains of sand tumbling down an incline.