more espe- cially that of this method has been other than those engaged in the last 20 years but recent developments of stage theories. But the investigations made by the late Mr. H. W. Stevenson had borne fruit. Indeed, nearly all are either illegitimate or have remained quietly at Belgrade. On the Allied line some 800 m. distant from the field was at the general atmosphere and three wood-pulp mills in Boston, Mass., May 22 1916. In roto and 1925. With the failure to carry on investigation and treatment of exterior ballistics in various parts