It is hard to believe that many of the ingredients for explosive mixtures, such as potassium nitrate, ammonium nitrate and phosphorus, were originally manufactured from putrefied urine. Phosphorus was discovered in 1669 by an alchemist, Hennig Brand while searching for a way to convert silver into gold. For his efforts, Brand was able to isolate a white, waxy solid that glowed in the dark and burst spontaneously into flame when exposed to air. The purification of phosphorus involved the evaporation of water from urine and allowing the resultant liquid to be putrefied for several months by bacteria. Brand later evaporated the water from urine and allowed the black residue to putrefy for several months. He then mixed this residue with sand, heated the mixture in the absence of air and collected, under water, the volatile phosphorus that precipitated out of the liquid.So get on it, and let us know how your experiments in putrefying your desiccated urine turn out.
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posted by mhjb at 6:22 PM on November 13, 2009 [3 favorites]