Plate I. 



A TYPICAL STEM AND ROOT OK SITKA SPRUCE ON MOIST SOU,. 



Age, 55 years ; height, 102 feet ; girth at 35 feet above ground, 4 ft. 6 ins. 



SITKA SPRUCE AND NORWAY SPRUCE ON EXPOSED SITE. 

 (The Sitkas are the taller trees.) 



\To face page 12. 



