Bladder Glass
Title
Bladder Glass
Subject
Pneumatics
Description
This is a device used to demonstrate the effect of atmospheric pressure. A glass vessel with openings at the bottom and top has its large top opening covered by a piece of animal bladder that is tied to seal it around its edges. As air is pumped from the vessel through the bottom opening, atmospheric pressure causes the bladder to deform downward, ultimately bursting with a loud bang. This seemingly simple effect is mentioned in the majority of nineteenth century physics textbooks.
Source
Property of the W&L Physics & Engineering Department
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