CONTENTS. 



Page. 



Introduction U 



Geographical distribution n 



Character of distribution, by regions 12 



Notes on general distribution 15 



Conclusions regarding natural distribution 16 



The White Pine lumber industry lg 



Original stand and present supplies 19 



Natural history 20 



Botanical description 20 



Relationship 21 



Morphological characters 21 



Root, stem, and branch sj stem 21 



Leaves 22 



Floral organs 22 



Seeds 23 



Seed supply 23 



The \vood 24 



Growth aud development 26 



Rate of growth 27 



Height growth 27 



Seedliug stage 27 



Development in open stand 28 



Development in the forest 30 



Effect of composition of forest upon height growth 32 



Effect of locality upon height growth 33 



Growth in thickness 34 



Detail measurements of annual gain in circumference 35 



Area accretion 36 



Form development, or taper 36 



Growth in volume 37 



Cubic contents of trees 38 



Lumber contents of trees 38 



Conditions of development 39 



Demands upon climate and soil 39 



Associated species 40 



Light requirements 43 



Yield of White Pine ' 44 



Dangers and diseases 49 



Injuries by human agency 49 



Injuries by storms 50 



Diseases 51 



Effect of heat and drought 51 



Parasitic diseases 51 



Insect enemies of the White Pine. By F. H. CHITTENDEN, Division of Entomology 55 



Introduction 55 



The destructive pine bark-beetle 55 



Remedies 56 



Other injurious bark-beetles 56 



Timber-beetles and other Scolytidie 57 



Pine sawyers aud other borers 57 



The white-pine weevil 58 



Moth caterpillars and plant-lice on trunks aud limbs 59 



Leaf-feeding insects 60 



5 



