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“Cowbell” Weighing bottles are glass laboratory equipment used for precise weighing of solids. Most of the glass used in the bottles is thin and fragile glass, but sometimes they are also made of ceramics or plastics. Dishes tend to have many different shapes.
“Cowbell” Woulff Bottle, usually two-necked but sometimes three-necked as seen here, is a standard item in the chemistry laboratory. In which he used a vessel with two outlets made with borosilicate glass.
