Files relating to the Ministry of Munitions Department of Trench Warfare, 1915-1917, concerning (fols. 1-172) production and testing of grenades, 1915-1917, including transfer of work from the War Office, July 1915, discussion of training, (fols. 26-32) employment of women on production, and (fols. 131-148) helmets, shields and hand grenades; (fols. 173-241) use of gas in trench warfare, May-Dec. 1915; (fols. 242-250) supply of grenades to Woolwich and elsewhere, 1915; (fols. 251-348) the…