Detailed analysis of the forest fire experience for a period of years is vital to an accurate appraisal of forest protection needs in any region. Such an analysis must include: 1. A survey of the property values to be protected, and the isolation of the most important features of the problem. 2. A study of the causes of fires and the possiblity of prevention. 3. A review of the records of previous fire control practices or standards. In all cases the facts must be viewed in accordance with the general agreement that 'damage from the fires to the forest types and the objectives of fire control must be based mainly upon caonsideration of these variations in damage.' The present analysis of the fire reports for the 13 westernforests in the Region One covering the years 1921 to 1930 has been made for these purposes.