CONTENTS 



PAGE 



Intbodttction ... 1 



PART I 



Stktjctural and Phtsioal Properties or Wood: 



General 5 



Pith . . 7 



Bark 8 



Primary wood 11 



Cambium 12 



Secondary wood 12 



Vessels 14 



Tracheids 16 



Wood fibres . 18 



Wood parenchyma 21 



Rays 23 



Resin ducts ... 29 



Pits 31 



Tyloses ... 35 



Pith flecks or medullary spots 36 



Bars of Sanio 38 



Tier-like arrangement of elements 39 



Growth rings 40 



Heartwood and sapwood 44 



Grain and texture ......... 46 



Knots 48 



Density and weight . 49 



Water content of v/ood 62 



iii 



