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A vacuum bell jar is placed on a base which is vented to a hose fitting, that can be connected via a hose to a vacuum pump. A vacuum is formed by pumping the air out of the bell jar. The lower edge of a vacuum bell jar forms a flange of heavy glass, ground smooth on the bottom for better contact. The base of the jar is equally heavy and flattened.
Kandor (commonly known as the Bottle City of Kandor) [1] is a fictional city spared from the doomed world of Krypton in DC Comics' Superman titles. Before Krypton exploded, the futuristic city was captured by the supervillain Brainiac, miniaturized by his shrinking ray and placed inside a glass bell jar.
A cloche (from the French for "bell") is a tableware cover, sometimes made out of silver though commercially available as glass, stoneware, marble, or other materials. They often resemble a bell, hence the name.
Parisian market gardens in the 1800s used 18-inch diameter bell-shaped glass jars (cloches) to protect plants in cold weather. They were used to protect everything from young seedlings to mature plants. Notched wooden sticks were used to prop up and vent the jars on sunny days, and were placed back down on the soil before nightfall. [2]
Jars are cylindrical containers with wide openings that may be sealed. Bell jars are used to contain vacuums. Test tubes are used by chemists to hold, mix, or heat small quantities of solid or liquid chemicals, especially for qualitative experiments and assays; Desiccators of glass construction are used to dry materials or keep material dry.
Bell Jar can mean: bell jar, a piece of glassware used mainly for scientific purposes; The Bell Jar, a literary work by Sylvia Plath. The Bell Jar (film) ...