Here's another hand-themed mechanical sculpture by artist Chris Eckert -- the man who created the The Waiting Machine I posted about back in 2008. This gorgeous piece is titled Think Machine.
From the sculpture description:
Cranking the handle drives a series of cams and levers making the fingers of the articulated hand tap rhythmically on the mahogany surface - automated contemplation.
See more photos of Think Machine by Chris Eckert on his web site.