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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.
The appearance of the Hedwig beakers resembles rock crystal, or quartz, and they are made of soda ash glass, which is composed of plant ash and quartz sand. [9] Although no two look exactly alike, all have a similar conical shape, thick walls, and wheel-cut ornament. [10]
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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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
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 ...
The "Luck of Edenhall" is an enamelled glass beaker that was made in Syria or Egypt in the middle of the 14th century, elegantly decorated with arabesques in blue, green, red and white enamel with gilding. It is now in the Victoria and Albert Museum in London and is 15.8 cm high and 11.1 cm wide at the brim.
A claw beaker is a name given by archaeologists to a type of glass cup or drinking vessel often found as a grave good in 6th and 7th century AD Frankish and Anglo-Saxon burials. Found in northern France , eastern England , Germany and the Low Countries , it is a plain conical beaker with small, claw-like handles or lugs protruding from the ...