Global silver trade from the 16th to 18th centuries American mining for the early part of the 16th Century. Mining in the Americas became formally industrialized when the process of mercury amalgamation became popularized. Mercury amalgamation was invented by a Spaniard in central Mexico in the 1550s. Historians dispute what individual was the first to invent the process, however most agree that it was a Spaniard. Mercury was the one of the highest costs of production for the Americas, since much of it had to be shipped. The ratio of Mercury to silver produced was about two to one. Furthermore, German miners introduced the stamp mill and lead smelting
Aztec Club of 1847 Pennsylvania home but, at President Grant's offer, in 1874 the meeting was held at the White House. Patterson's mansion was located on the southwest corner of 13th and Locust Streets. After his death in 1881, the Historical Society of Pennsylvania purchased the mansion as its permanent home. The mansion was demolished between 1905 and 1909 and a new building dedicated in 1910. At the Annual Meeting held at Hotel Bellevue, Philadelphia, on September 14, 1881, Ulysses S. Grant was elected Vice President of the Aztec Club, announcing his intention to become its president. Following the War of the Rebellion (America's