CONTENTS 



CHAPTER I. GENERAL 



PAGE 



Introduction i 



Original forests 2 



History of lumber cut 2 



Present forest resources 3 



Rate of consumption 4 



Annual production of lumber 6 



Lumber values 9 



Use of the lumber cut n 



Wastage in production of forest products 12 



Converting factors 14 



CHAPTER II. WOOD PULP AND PAPER 



General 18 



History of pulp and papermaking 20 



Kinds of paper manufactured 22 



Requirements of desirable pulp woods 22 



Annual consumption of wood 23 



Woods used 24 



Consumption by states 26 



Consumption by processes 27 



Raw material 28 



Requirements for the establishment of a pulp mill 30 



The manufacture of mechanical pulp 31 



Preparation of the wood 31 



Barking 31 



Cold and hot ground wood pulp 33 



Screening 35 



Yield 37 



The manufacture of sulphite pulp 38 



The manufacture of sulphate pulp 47 



The manufacture of soda pulp 48 



The manufacture of paper from pulp 50 



Imports of pulp wood and wood pulp 57 



CHAPTER III. TANNING MATERIALS 



General 60 



Historical. . 61 



