CONTENTS, 



Page. 



Introduction 9 



Distribution 9 



Associated species 10 



Undergrowth 11 



Habit 11 



Tolerance H 



Growth under cover 12 



Demands upon soil and moisture 14 



Reproduction 14 



Enemies 15 



Fungi (conk and ground rot) 15 



Insects 1(> 



Boring beetles 18 



Black check 19 



Immunity from white ants (termites) 20 



Parasites 20 



The wood T 21 



Durability 22 



Defects 22 



Uses 23 



Manufacturing problems 24 



Present market standing 24 



Accessibility 26 



Lumbering 28 



Volume and yield, first-growth Hemlock 30 



Logged-off lands 36 



Volume and yield, second-growth Hemlock 40 



Utilization of second-growth stands 44 



Hemlock left after lumbering 46 



Bark '. 48 



Volume and yield 50 



Harvestmg 52 



Extract 53 



A list of the trees of Oregon and Washington 54 



5 



