Fundamentals of Fire Extinguishment An educational booklet on fire, suitable for distribution to fire protection personnel, has been published by Ansul Chemical Co. “Fundamentals of Fire Extinguishment” is a 4-page illustrated discussion of what fire is, classes of fire and proper methods of extinguishment. Originally introduced as an aid in training salesmen, “Fundamentals of Fire Extinguishment” has been widely requested and used by fire departments, industrial fire brigades, insurance companies, and other fire protection groups. Copies are available from Ansul Chemical Co., Marinette, Wis., on request.