London EV Company London EV Company London EV Company Limited (LEVC, formerly The London Taxi Corporation Limited trading as The London Taxi Company) is an automotive engineering company with its headquarters near Coventry, United Kingdom, and a wholly owned subsidiary of Chinese automaker Geely. The company is famous for its London black taxicabs. Geely's involvement in British taxicab production dated to 2006 when it partnered with LEVC's predecessor The London Taxi Company, and its parent Manganese Bronze Holdings, in the creation of a China-based taxicab manufacturing joint venture. In 2009 Geely bought shares in Manganese Bronze Holdings. In 2012 Manganese Bronze Holdings entered
Manganese in glassmaking, manganese dioxide was available for experiments by alchemists, the first chemists. Ignatius Gottfried Kaim (1770) and Johann Glauber (17th century) discovered that manganese dioxide could be converted to permanganate, a useful laboratory reagent. By the mid-18th century, the Swedish chemist Carl Wilhelm Scheele used manganese dioxide to produce chlorine. First, hydrochloric acid, or a mixture of dilute sulfuric acid and sodium chloride was made to react with manganese dioxide, later hydrochloric acid from the Leblanc process was used and the manganese dioxide was recycled by the Weldon process. The production of chlorine and hypochlorite bleaching agents was a