% UNITED STATES DEPARTMENT OF AGRICULTURE 
i No. 1298 
- ■ f 
Washington, D. C. y I^O/\j April, 1925 
— ±1. 
d*puu 
ANDP 
CONTROL OF DECAY IN PULP AND PULP WOOD 
OTTO KRESS, formerly in charge, Section of Pulp and Paper, Forest Products Laboratory; C. J. HUMPHREY, 
Pathologist, and C. A. RICHARDS, Assistant Pathologist, Office of Investigations in Forest 
Pathology; M. W. BRAY, Chemist in Forest Products, and J. A. STAIDL, Assistant 
Engineer in Forest Products, Forest Products Laboratory, Forest 
Service, in cooperation with Bureau of Plant Industry 
CONTENTS 
Page 
Importance of Decay Problem in Pulp Industry 1 
Decay of Wood 4 
Storage of Pulp Wood "i 6 
Pulping Characteristics of Decayed Wood 14 
Chemical Properties of Decayed Wood and Pulp made from Decayed Wood . . 20 
Storage of Pulp 25 
Physical Properties of Pulp Decayed in Storage 29 
Preservation of Pulp by Chemical Treatment .31 
Summary 49 
Appendix: Studies of Specific Fungi that Deteriorate Wood Pulp - 52 
Physical and Chemical Properties of Ground-wood Pulp Deteriorated by Specific Fungi 
in Pure Cultures 67 
Bibliography 79 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
192S 
