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Mercury retort (Practical Action Technical Brief)
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=== Parts required === The retort's pipe and fittings, except for the wooden stopper (2e) should be made from ordinary galvanised iron. Piping made from copper or other metals should not be used as these combine readily with mercury. * 20-inch length of 1/4-inch-diameter galvanised iron pipe (2a), with screw thread at one end. (If 1/4-inch pipe is not available, then use 1/2-inch pipe, but note that the smaller the pipe diameter the better)<br> * 1/2-inch to1/4-inch galvanised iron pipe reducing bush (2b)<br> * 1/2-to-1 &1/2-inch galvanised iron pipe reducer (2c)<br> * 1 &1/2-inch galvanised iron pipe plug (2d)<br> * a wooden stopper to fit the 1/4-inch pipe (or 1/2-inch) discharge end (2e).<br> * piece of tightly woven cotton cloth, about 3 inches by 5 inches, to be rolled into tube connected at the end of the pipe to serve as final discharge outlet) . This is included to prevent possible reverse suction of water when the retort is removed from the heat while the discharge end is dipped into the water in the glass.<br> [[File:mercury retort part2.jpg|thumb|150px|right|Figure 3: Pipe bending using a clamp or vice]]
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