U. S. DEPARTMENT OF AGRICULTURE. 
BUREAU OF PLANT INDUSTRY—BULLETIN NO. 36. 
B. T. GALLOWAY, Chief of Bureau. 
THE “BLUING” AND THE “RED ROT” OF THE WESTERN 
YELLOW PINE, WITH SPECIAL REFERENCE TO 
THE BLACK HILES FOREST RESERVE. 
HERMANN VON SCHRENK, 
SPECIAL AGENT IN CHARGE OF THE MIsSISSIPPI VALLEY 
LABORATORY. 
VEGETABLE PATHOLOGICAL AND PHYSIOLOGICAL INVESTIGATIONS. 
IssvED May 5, 1903. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1908. 
