Teacher 
Distributor
A complete set of pump plate machined and bell jar.
Made of aluminium metal, with tube for connection to pump and stopcock for air regulation on central pillar, supplied with a rubber seal which facilitates sealing in bell jar experiments. Mounted on painted heavy tripod base.
A new improved Acrylic Bell Jar of size 25 x 14 cm compatible with the pump plate. The bottom flange is ground flat to ensure a perfect seal. Electric bell is mounted for sound in vacuum experiments. Operates on 4-6V AC/DC.
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