CONTENTS. 



Page. 



Chapter I. — Thk Life ok a Tree 7 



The i)ait8 of a tree 8 



The food of a tree 11 



The composit ion of wood 11 



How the tree hreathes 15 



Transpiration 16 



The growth of a tree 18 



The structure of wood 19 



Annual rings 22 



Heartwood and sapwood 23 



Chapter II. — Trees in the Forest 25 



The various reciuiroments of trees 25 



Requirements of trees for heat and moisture 26 



Requirements of trees for light 30 



Tolerance and intolerance 32 



The rate of growth 36 



The reproductive power of trees 37 



The succession of forest trees 39 



Pure and mixed forest 39 



Reproduction by sprouts 12 



Chapter III. — The Life of a Forest 14 



A community of trees 11 



The life of a forest crop 16 



The seven ages of a tree 17 



How the crop begins 19 



The forest cover established 51 



The beginning of the struggle 52 



Growth in height 51 



The struggle continued 56 



Natural pruning 58 



5 



