PIRA Classification: 4F10.10
Description: Concentric Plexiglas cylinders contain glycerin. The inner cylinder can be turned with a handle. A vertical line of ink is injected into the glycerin with a syringe. The handle is turned one direction, while the number of revolutions is kept track of. The cylinder is then turned in the opposite direction, the same number of turns.
Special Instructions: None
Condition: Ok
Setup time: 2 minutes
Safety Issues: None