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Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers

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To: E. Charters who wrote (64946)	4/27/2009 11:09:27 PM
From: philv	Read Replies (1) of 78418

"(Editor's Note: It was known that sulphides and silver will dissolve in nitric acid but gold would not. Few today would recognize that the same weight of silver will not weigh the same as gold in water. But this is true, as the water is displaced more by the more voluminous weight of silver, thus supporting it more, even on a balance. The coinage of the time was very nearly pure silver. If Marshall weighed 10 grams of silver and 10 grams of gold, he would have noticed the same weight of the two materials on the balance in air, and a difference of 0.43 grams of greater weight of the gold in water. Such an apparatus for determining the relative SG of minerals in water and air is called a Jolly Balance and it was widely used to determine the purity of gold dust in Goldfields in America since the very early days before the 1849 Gold Rush.)" That's awfully interesting. Hadn't thought that the Specific Gravity would affect the weight of metal differently in water. They weigh the metal "in the water" as opposed to weighing it together "with" the water. Jolly good!

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