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Alternatively, a beaker may be covered with another larger beaker that has been inverted, though a watch glass is preferable. Beakers are often graduated, that is, marked on the side with lines indicating the volume contained. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume.
Glass evaporating dishes, such as watch glasses, are primarily used as an evaporating surface (though they may be used to cover a beaker.) The Petri dish is a flat dish filled with a nutritious gelatin that allows for microorganisms to quickly grow, its named after its inventor Julius Petri in the 1880s.
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A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance, and as a cover for a beaker. When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does ...
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Beaker (drinkware), a beverage container; Beaker (laboratory equipment), a glass container used for holding liquids in a laboratory setting; Beaker (archaeology), a prehistoric drinking vessel; Beaker culture, the archaeological culture often called the Beaker people; Sippy cup, referred to as a beaker in UK English
Anglo-Saxon glass had several types of cup, most shared with continental areas, including "palm cups" with no flat bottom, claw beakers, glass horns, and different types of beaker. In the European Middle Ages the shapes of most ordinary cups were closer to mugs , tankards , and goblets rather than modern cups, in wood, pottery, or sometimes ...
This page was last edited on 9 September 2024, at 13:54 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.