Consists of a pair of nested plexiglass cylinders with a cap on the top and bottom of the bigger cylinder, and a handle connected to the inner cylinder. There's a hole in the top that accesses the space between the cylinders, which is filled with glycerol.
Displays an unusual example of a reversible processes in a highly viscous liquid. After some dye has “dispersed” in the glycerol, the handle can be turned to make it all come back together. With a reversible process, it's possible to turn back the hand of time.
The handle can be turned a limited number of times before it is impossible to reverse the effect. Turning the handle with a jerky motion may inhibit the dye coming back together.
Demo room information