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The Leading Facts of New Mexican History
Twitchell, considered the first major historian of New Mexico, showcased the states traditions, history, beauty, glamour, scenery, archaeology, and material resources in this 1911 edition.
Clays in the Minerals Processing Value Chain
Clays are increasingly becoming a major problem in the mining, extraction and value-adding processes for a wide range of commodity raw materials. Clays can impact negatively on virtually every unit process within the mining and minerals processing sector, having long-term environmental implications that go well beyond the lifetime of the mining operation. This book is the first to compile, explain and evaluate the effects of clays in the mineral processing value chain, from mining to minerals processing, and finally, tailings disposal. Focusing on topics from the chemistry and rheology of clays to their detection and dissolution behaviour, this book provides comprehensive coverage of the effects on processes such as settling, preg-robing, flotation and comminution. It is an excellent reference for professional mineralogists and geologists, industrial engineers, and researchers interested in clays and clay minerals.
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Purchasing Whiteness
“A magisterial tour de force that will be received as a significant contribution to the historiography of race in colonial Latin America.” —Cecily Jones, H-Caribbean The colonization of Spanish America resulted in the mixing of Natives, Europeans, and Africans and the subsequent creation of a casta system that discriminated against them. Members of mixed races could, however, free themselves from such burdensome restrictions through the purchase of a gracias al sacar—a royal exemption that provided the privileges of Whiteness. For more than a century, the whitening gracias al sacar has fascinated historians. Even while the documents remained elusive, scholars continually mentioned th...
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