History of Bolivia to 1809 reduction in silver output. After 1700 only small amounts of bullion from Upper Peru were shipped to Spain. Kings from the Bourbon Dynasty in Spain tried to reform the colonial economy in the mid-eighteenth century by reviving mining. The Spanish crown provided the financial support necessary to develop deeper shafts, and in 1736 it agreed to lower the tax rate from 20 to 10 percent of the total output. The crown also helped create a minerals purchasing bank, the Banco de San Carlos in 1751 and subsidized the price of mercury to local mines. The foundation of an academy of
Manchuria under Yuan rule Manchuria under Yuan rule Manchuria under Yuan rule refers to the Yuan dynasty's rule over Manchuria, including modern Northeast China and Outer Manchuria from the beginning to the end of the dynasty. Mongol rule over Manchuria was established during the Mongol Empire's conquest of the Jurchen Jin dynasty in the early 13th century. It became a part of the Yuan dynasty, division of the Mongol Empire, when the dynasty was founded by the Mongol leader Kublai Khan. Even after the overthrown of the Mongol Yuan dynasty by the Ming dynasty founded by native Chinese in 1368, Manchuria was still controlled