Galena, Illinois called Galena "La Pointe" and early Americans adopted this name as "The Point". Early documentation officially records the name as "Fever River", an early name for the Galena River, though it does not appear that this name was commonly used. George Davenport, a retired colonel in the United States Army, successfully shipped Galena's first boatload of lead ore down the Mississippi River in 1816. Three years later, Jesse W. Shull built a trading post. The Thomas H. January family, who arrived in 1821 from Maysville, Kentucky, are considered the first permanent American settlers. The next year, the US Department of
Mineral processing is not completely known and further research into their mechanisms is being performed. Depressants and activators are used to selectively separate one mineral from another. Depressants inhibit the flotation of one mineral or minerals while activators enable the flotation of others. Examples of these include CN, used to depress all sulfides but galena and this depressant is believed to operate by changing the solubility of chemisorbed and physisorbed collectors on sulfides. This theory originates from Russia. An example of an activator is Cu ions, used for the flotation of sphalerite. There are a number of cells able to be used