CONTENTS. 



Page. 



Introduction " 



Distribution 9 



Associated species 10 



Undergrowth H 



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 16 



Boring beetles 18 



Black check 19 



Immunity from white ants (termites) 20 



Parasites - 20 



The wood 21 



Durability 1 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 



Harvesting 52 



Extract 53 



A list of the trees of Oregon and Washington 54 



5 



