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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.
Several companies produce reagent bottles, including Wheaton, Kimble, Corning, Schott AG, Sklárny Moravia and trademark glass names include Pyrex, Kimax, Duran, Boro and Bomex. Common bottle sizes include 100 ml, 250 ml, 500 ml, 1000 ml and 2000 ml. Older bottles, especially for medical use and for expensive chemicals, can be found of ...
Three beakers, an Erlenmeyer flask, a graduated cylinder and a volumetric flask. Laboratory glassware is a variety of equipment used in scientific work, traditionally made of glass. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes. It is commonly used in chemistry, biology, and analytical laboratories.
Büchner flask or Sidearm flask or Suction flask—they are a flat-bottomed flask, but made of very thick and resistant glass. They are usually a cone shape—similar to the shape of an Erlenmeyer flask, but also have side neck, usually affixed to the side, 2 / 3 up from the bottom.
Ground glass surfaces are shown with gray shading. By assembling them in the direction of the arrows, they can be joined. The conically tapered ground glass joints typically have a 1:10 taper and are often labeled with a symbol S T, consisting of a capital T overlaid on a capital S, meaning "standard taper". This symbol is followed by a number ...
The ends of the necks are usually conical ground glass joints. These are standardized , and can accept any similarly-sized tapered (male) fittings. 24/40 is common for 250 mL or larger flasks, while smaller sizes such as 14/20 or 19/22 are used for smaller flasks.