“New and Improved” Technos Bell Jar Experiment Kit
This pump plate and bell jar can be used to demonstrate the nature of sound waves by showing that sound does not exist in a vacuum. As air is pumped out of the jar the sound from the bell becomes fainter and fainter until it disappears.
- Includes: Glass bell jar, vacuum base plate, gasket, Hose, Battery operated electric bell and instructions.
- Bell may be removed for other vacuum experiments.
Note: Batteries not included (takes 2 x AA batteries).