CORUNDUM

(Al1.0 3), the hardest mineral except the diamond, occurring in several varieties—the ruby, sapphire, Oriental amethyst, topaz, emerald. Common ¢. is found in grains in sand (India), and in igneous rocks in U.S., and is used for bearings in watches and scientific apparatus, and for grinding. Emery is impure c. See ABRASIVES. 8° 25’ W.), fortified seaport, capital of C. province, Spain, on small bay, N.W. coast; commodious harbor; has two old churches (XII. and XIII. cent.), two hospitals, arsenal, barracks, cigar factory; sailing port of Armada, 1588; burned by English under Drake, 1598; scene of battle, Jan. 16, 1809, in which Sir John Moore fell after defeating the French; exports wine, fish, and agricultural produce; imports coal and manue factured goods. Pop. 61,000 30’ W.), N.W. province, Spain; bounded N. and W. by Atlantic Ocean; district is mountainous and generally fertile; extensive fisheries; chief exports—farm progee. fish; area, 3,051 sq. miles. Pop.