REFERENCES 261 



Suppression may be made easier by tlu- disposal of slash, 

 in that a forest unincumbered with slash is more readily 

 traversed and fires more effectively fought where slash is 

 lacking. 



The employment of severance cuttings, creating cleared 

 lines at intervals throughout the forest, also serves to facili- 

 tate access and affords vantage points from which lire-fighting 

 may be begun. 



Development (by artificial regeneration) of belts of fire 

 resistant species, parallel to railroad lines or in other locations 

 of high fire hazard, may be used where management can be 

 intensive for preventing the start or spread of forest fires. 



With such exceptions as have just been given, elimination 

 of the causes, quick detection and prompt suppression of 

 forest fires cannot be influenced to any large extent by silvi- 

 cultural treatment of the forest. 



REFERENCES 



1. PLUMMER, FRED G. Forest Fires. Bulletin 117, United States Forest 

 Service, Washington, 1912. 



2. PETERS, J. G. Forest Fires in the United States in 1915. Circular 69, 

 Office of Secretary, United States Department of Agriculture, 1917, p. 3. 



3. Oregon Forest Facts. State Board of Forestry, Salem, Oregon, 1917. 



4. MAYR, HEINRICH. Waldbau auf Naturgesetzlicher Grundlage. Ber- 

 lin, 1909, p. 12. 



5. GRAVES, H. S. Principles of Handling Woodlands. Wiley & Sons, 

 Inc., New York, 1911. 



6. LONG, W. H. Effect of Forest Fires on Standing Hardwood Timber 

 Circular 216, United States Forest Service, Washington, 1913. 



7. NISBETJ. Studies in Forestry. Oxford, 1894. Pp. 101-107. 



8. GARY, AUSTIN. Ticks and Timber. American Forestry, Vol. 26, 1920, 

 pp. 92-94. 



9. OSBORNE, W. B. Jr. The Western Fire Fighters Manual, Chapter 

 VII, Fire Fighting, 1919, pp. 17-22. 



10. FILLEY, W. O. Report of the Forester in Part VI of the Annual Re- 

 port for 1916 of the Connecticut Agricultural Experiment Station, New Haven, 

 p. 380. 



