Gold costs were about $317 per troy ounce in 2007, but these can vary widely depending on mining type and ore quality; global mine production amounted to 2,471.1 tonnes. After initial production, gold is often subsequently refined industrially by the Wohlwill process which is based on electrolysis or by the Miller process, that is chlorination in the melt. The Wohlwill process results in higher purity, but is more complex and is only applied in small-scale installations. Other methods of assaying and purifying smaller amounts of gold include parting and inquartation as well as cupellation, or refining methods based on the dissolution
Four Ways to Forgiveness Stories, Volume Two" as well. "Four Ways to Forgiveness" has been referred to as a story-suite by critics, based on Le Guin's own use of the term to describe her deliberate inclusion of linked short stories in book form. Le Guin has remarked that the collections of stories could have been a novel had she focused on a few characters; instead she decided to focus on a work with many voices. Four Ways to Forgiveness Four Ways to Forgiveness is a collection of four short stories and novellas by American writer Ursula K. Le Guin. All four stories are set