PIRA Classification: 4D50.70
Description: The flat sides of a metal cylinder have been replaced by a permeable membrane. The cylinder is filled with a solution of glycerine, water, and dye. The only opening is a 10 inch plastic tube. The system is placed in a beaker of water. Allow the entire class period for the water to rise several inches.
Special Instructions: None
Condition: Ok
Setup time: 2 minutes
Safety Issues: None