In 1843, an Oxford University professor reported to British academics and agriculturalists on a deposit of phosphorite he had visited in Logrosan, Extremadura, Spain. A mineral much in demand by manure manufacturers, once crushed, it was dissolved in sulphuric acid to produce superphosphate, the world's first artifical chemical manure. Once the railway between Madrid and Lisbon was constructed in the 1860s, the industry took off. Although competition from cheaper overseas phosphates caused many of the phosphate companies to go out of business in the 1890s, demand from Spanish superphosphate manufacturers ensured the industry's survival until the mid-1900s. Today, with the assistance of EU funding, a number of these mines have been developed as tourist attractions as part of Spain's geo-mining heritage. Bernard O'Connor and Leyre Solano's book investigates the origins, development and eventual decline of the Spanish phosphate industry.
"The last great work of the age of reason, the final instance when all human knowledge could be presented with a single point of view ... Unabashed optimism, and unabashed racism, pervades many entries in the 11th, and provide its defining characteristics ... Despite its occasional ugliness, the reputation of the 11th persists today because of the staggering depth of knowledge contained with its volumes. It is especially strong in its biographical entries. These delve deeply into the history of men and women prominent in their eras who have since been largely forgotten - except by the historians, scholars"-- The Guardian, https://www.theguardian.com/books/booksblog/2012/apr/10/encyclopedia-britannica-11th-edition.