| Description | Home Office circular letter dated 17 December 1936: Anti gas training. Home Office circulars dated 8 July 1937, 10 July 1937. Letters and information and instructions to tutors in first aid and anti gas precautions. Anti gas training, protective clothing, gas chambers. Letters to instructors and exams. Use of gas chamber at Upwood RAF station. Courses by St John's Ambulance brigade. |