Files relating to the Ministry of Munitions Department of Trench Warfare, 1916-1917, concerning (fols. 1-95) development of chemical shells, 1916-1917, including discussion of requirements, German use of prussic acid/cyanide, animal testing of respirators, Stokes Smoke shells, physiological effects of gas, use of 'jellite' and phosgene, reports of the Chemical Advisory Committee and Porton Down Research Centre; (fols. 96-599) reports of the Chemical Advisory Committee, Mar. 1916-July 1917;…