I. Trinitrotoluene Poisoning: Its Nature, Diagnosis, and Prevention, by Carl Voegtlin, Charles W. Hooper, and J.M. Johnson. II. The Toxic Action of "parazol," by Carl Voegtlin, A.E. Livingston, and Charles W. Hooper. III. Mercury Fulminate as a Skin Irritant, by A.E. Livingston. [U.S. Hygienic Laboratory Bulletin No. 126. September 1920.].