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Mariano Eduardo de Rivero y Ustáriz (12 October 1798 – 6 November 1857) was a prominent Peruvian scientist, geologist, mineralogist, chemist, archaeologist, politician, and diplomat. His publications on the discovery of Humboldtine (an iron-oxalate), which demonstrated the existence of organic minerals; on deposits of copper and sodium nitrate (saltpeter) near Tarapacá in the Atacama Desert; and on the industrial potential of guano and coal in Peru were forward-looking. He is considered a pioneer of mining education in South America and one of the most notable Peruvian scientists of the 19th century. (From Wikipedia)

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• Tschudi, Johann Jakob von, 1818-1889
• Hawks, Francis L. (Francis Lister), 1798-1866