By A. Pearson, M.B., B.S. Lond., Late chief Medical Officer of the Tanganyika Concessions and Union Miniere Du Haut-Katanga, and R. Mouchet, M.D., Late Assistant at the University of Liege; Late of the State Laboratory at Leopoldville; Chief Medical Officer of the Union Miniere Du Haut-Katanga. Publishers, Bailliere, Tindall & Cox, London. Price 22s. 6d.