Issued January 23, 1909. 



U. S. DEPARTMENT OF AGRICULTURE, 



FOREST SERVICE— Circular ISO. 



GIFFORD PINCHOT, Forester. 



DOUGLAS FIR: 



A STUDY OF THE PACIFIC COAST AND 

 ROCKY MOUNTAIN FORMS. 



By 



E. H. FROTHINGHAM, 



FOREST ASSISTANT. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1909 



58398— Cir. 150—09 1 



