Univ. or MICH. AUG 88 1908 Issued July 31, 1908. U. S. DEPARTMENT OF AGRICULTURE, FOREST SERVICE-Circular 151. GIFFORD PINCHOT, Forester. THE PRESERVATIVE TREATMENT OF 1 By W. F. SHERFESEE, CHIEF, OFFICE OF WOOD PRESERVATION. WASHINGTON: GOVERNMENT PRINTING OFFICE: 1908 44210-Cir. 151-08- -1 |