0 a large glass cover shaped like a bell used to cover chemical equipment, especially to prevent any gas from escaping
Air under a bell jar may be kept dry by means of a basin of sulphuric acid, and gases bubbled through it are freed from water-vapour.
By keeping some of this covered with a bell jar for a week or two, so as to retain the moisture, at the end of this time a large crop of the fungus will probably have made its appearance.
The whole electrolysis vessel is then placed under a glass bell jar containing dry air, and kept in a refrigerator until again required for use.
Bell jars are generally used for classroom demonstrations or by hobbyists, when only a relatively low-quality vacuum is required.
Although internationally connected, each country's elite lives in a bell jar in the sense of being out of touch with its own populace.
By pumping the air out of the bell jar, vacuum is formed.
She describes her depression as a feeling of being trapped under a bell jar, struggling for breath.
As the family laugh together, it is revealed that they are models inside a bell jar on the street stall seen earlier.
