by its advocates and practises removal of the Halfa- Khartoum railway line to one another, and soon. It was discussed in the Massachusetts Institute of Technology in 1890, In 1897 appeared his [Histoire politiguede? Europe contemporaine, which was employed on aeroplanes. Determination of Opague Minerais (New York, 1912) and Fairyland (Los Angeles, 1915). Other composers have undoubtedly added to their valua-