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The apparatus consists of a stand in which two or four rings of specified dimensions may be placed. The rings are filled with bitumen on a base plate and balls of specified weight and dimensions are placed on the solidified material through guides. The whole assembly is placed inside a 600c.c. beaker with a hand stirrer. A suitable thermometer is used to note down the temperature of melting. Heating of bath can be done by an and electric heater controlled by an energy regulator stirring is done by motorized stirrer.
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