Bell jar by Wikipedia Bot 0
A "bell jar" is a closed glass jar that is often used in scientific experiments and demonstrations. It can create a vacuum when placed over an object and the air is removed, enabling various experiments related to air pressure, gas behavior, or demonstrating principles of physics. In a broader context, the term "bell jar" is also associated with Sylvia Plath's semi-autobiographical novel "The Bell Jar," published in 1963.

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