Gold parting valens") could be made by the distillation of saltpetre (KNO) with alum (KAl(SO)) or vitriol (FeSO) with water. 2KNO + HO + FeSO → FeO + KSO + 2HNO Nitric acid, after distillation to increase the acid strength, is capable of dissolving the silver but it will not (by itself) dissolve the gold. However, nitric acid is not able to (fully) extract silver and other impurities from an alloy with a high content of gold. Therefore, one part of scrap gold was typically alloyed with three parts of copper (quartering) before parting with nitric acid. Another method uses Sterling silver
The Electric Kool-Aid Acid Test a--Wolfe’s a genius. He did a lot of that stuff, he was only around three weeks. He picked up that amount of dialogue and verisimilitude without tape recorder, without taking notes to any extent. He just watches very carefully and remembers. But, you know, he’s got his own editorial filter there. And so what he’s coming up with is part of me, but it’s not all of me. . . .” The Electric Kool-Aid Acid Test The Electric Kool-Aid Acid Test is a nonfiction book by Tom Wolfe that was published in 1968. The book is remembered today as an