CONTENTS. 



PagB. 



Introduction 11 



Geographical distribution 11 



Cluiracter of distribution, by regions 12 



Notes ou general distribution lij 



Conclusions regarding natural distribution 1<> 



The Wliite Pine lumber iu<lu8try 1<> 



Original stand and present supplies li' 



Natural history 20 



Botanical description 20 



Rehitiousliip -'1 



Morphological characters 21 



Root, stem, and branch s\»tcir. 21 



Leaves 22 



Floral organs 22 



Seeds 23 



Seed supply 23 



The wood 21 



(irowth and development 26 



Kate of growth 27 



Height grow til 27 



Seedling stage 27 



Development in open si and 28 



Devolopnieut in the forest 30 



Ettect of composition of forest upon height growth 32 



Eflect of locality upon height growth 33 



Growth in thicl<ness 34 



Detail measurements of annual gain in circumference 35 



Area accretion 3(! 



Form development, or taper 36 



Growth in volume 37 



Cubic contents of trees 38 



Lumber contents of tries 38 



Conditions of development 39 



Demands upon climate and soil 39 



Associated species 40 



Light re([uirements 43 



Yield of White Pine 41 



Dangers and diseases 49 



Injuries by human agency 49 



Injuries by storms ">0 



Diseases :">! 



Effect of heat and drought 51 



Parasitic diseases 51 



Insect enemies of the White Pine. By F. 11. Ciiittexden, Division of Entomology 55 



Introduction 55 



The destructive pine bark-beetle 55 



Remedies .56 



Other injurious bark-beetles .56 



Timber-beetles and other Scolytida' 57 



Pine sawyers and otlier borers 57 



The white-pine weevil 58 



Moth caterpillars and plant-lice ou trunks and limbs 59 



Leaf- feeding insects 60 



5 



