Amalgam (chemistry) gold") would not be extractable from ore using hydro-mechanical methods. Large amounts of mercury were used in "placer mining", where deposits composed largely of decomposed granite slurry were separated in long runs of "riffle boxes", with mercury dumped in at the head of the run. The amalgam formed is a heavy solid mass of dull gray color. (The use of mercury in 19th century placer mining in California, now prohibited, has caused extensive pollution problems in riverine and estuarine environments, ongoing to this day.) Sometimes substantial slugs of amalgam are found in downstream river and creek bottoms by amateur wet-suited
ReAction! Chemistry in the Movies by the benevolent Dr. Jekyll on one hand and the evil Mr. Hyde on the other to describe how chemists and chemistry are portrayed in the movies. There are 10 chapters, the first five of which have dark chemical themes and the second five of which have bright chemical themes. The chapter titles are: According to several reviews, the book's strength is when it explores what might be the real chemicals that inspired the fictional compounds found in certain movies. ReAction! Chemistry in the Movies ReAction! Chemistry in the Movies (2009, ) is a nonfiction book about movies, chemistry, and