![](http://www.alamy.com/thumbs/6/B45C8E55-71D1-42B3-B816-425DE1B0A63B/TDNRYN.jpg)
Photocopied August 1972, from Bray, The Principles of Metallurgy, Ginn and Co., New York, 1929. A COTTRELL TREATER. TOOELE SMELTER SINTER PLANT. - International Smelting and Refining Company, Tooele Smelter, State Route 178, Tooele, Tooele County, UT
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