 Complete the following phrase:  Adrien C. B. Chenot born on August 30, 1803; died November 27, 1855 was a French engineer best known for his inventions in metallurgy as well as his research on manufactured gases. He is notably the inventor of one of the first modern methods of direct reduction of iron ore, based on the use of coal reacting with the ore in retorts . He exhibited the first samples of pre-reduced iron ore at the Lisbon Universal Exhibition of 1849, and was awarded the Grandes Medailles dOr Gold Medal of Honour at the 