Number 



U 14. Chemical weed eradication in forest nurseries. By ¥. G, 



VJahlenberg. 2 pp. June 1921. 



U 15. Precipitation in relation to forest fires. By J. A. 



Larsen. 4 pp. July 1921. , 



U 16. Field conference of investigators .in silviculture. By 



w. C. Lowdermilk. 4 pp. July 1921. 



U 17. A unit of area as a unit of restocking. By IJ. C. Lowdermilk, 



3 pp. August 1921. 



U 13. A method of reporting on forest plantations. By D. 3, 



Olson. 4 pp. Sept. 1921. 



U 19. Can timber owners afford to leave the small trees? By 



James W. Girard. 4 po. Oct. 1921. 



U 20. Swamper slash piling. By W. C. Lowdermilk. 3 pp. Oct. 1921. 



U 21, "Selective burning" of slash. By W. C. Lowdermilk. 3 pp. 



Nov. 1921. 



U 22, Germinations of seed in the duff under western white pine 



stands. By J. A. Larsen. 3 PP. Nov. 1921. 



U 23. Slash disposal combined with logging in the stands of 



central Montana. By John H. Clack. 2 pp. Mar. 1922, 



U 24. Note on the pathological effects of blazing trees. By 



James R. Weir. 2 pp. Mar. 1922. 



U 25, Bark beetles and the forest. By James C, Evenden. 



3 pp. Apr. 1922. 



U 26. The problem of slash disposal. By.H,.R, Flint. 3 pp. 



Acr. 1922. 



U 27. Seed production of lodgepole pine (Pinus contort a , Loudon). 



By W. C. Lowdermilk. 2 pp. Apr. 1922. 



U 28. Winter slash disposal on the Kaniksu National Forest. By 



W. C. Lowdermilk. 4 pp. Apr. 1922. 



U 29. , Investigations in slash disposal in the western yellow 



pine type. By James W. Girard & W. C. Lowdermilk. 

 8 pp. May 1922. 



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