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Jar testing is a method of simulating a full-scale water treatment process, providing sys-tem operators a reasonable idea of the way atreatment chemical will behave and operatewith a particular type of raw water.
jar - a vessel (usually cylindrical) with a wide mouth and without handles. amphora - an ancient jar with two handles and a narrow neck; used to hold oil or wine. beaker - a flatbottomed jar made of glass or plastic; used for chemistry.