INDEX. 87 



Page. 



Non-porous woods, definition 64 



Odor 24 



Piling or stacking 31 



Pine, bled, as strong as unbled 51 



Pith rays in conifers 17 



of broad-leaved trees 20 



proportion, in pine 34 



cause of cbecking 34 



Pits bordered 17 



Pores, description 18 



tbeir importance '. 19 



affecting weight and strengtb 27 



used in distinguisbing woods 61, 64 



Pulp : 54 



Resin ducts 16, 18 



Resonance 24 



Rift-sawed boards, behavior in seasoning 36 



Ring-porous woods, definition 64 



Rosin 53, 54 



Sapwood of conifers 13 



shrinks more tban heartwood 36 



Sawing, manner affects strength 8, 9 



Seasoning, rate 30 



methods 31 



influence on bending strength 41 



hardness 47 



Shearing 45, 46 



table of different species 46 



across grain 47 



Shocks, resistance 49 



Shrinkage fully discussed 30, 32-37 



tangential, influence of summer wood and spring wood 35 



sap and heart wood 36 



table for different species 37 



conifers and broad-leaved trees 36 



Soaking, effects 24, 30, 31, 36, 50 



Sunt 54 



Specific gravity (see also Weigbt) 25 



Spring wood, definition 15 



structure in coniferous wood 17 



oak 19, 21 



Stiffness 38-41 



table of different species 41 



Strength of wood. (See Mechanical properties.) 



Structural aggregates of a stick 9 



Structure of coniferous wood 12-18 



use of its knowledge 11 



of wood of broad-leaved trees 18-23 



anatomical, of conifers 16 



broad-leaved trees 20, 21 



Summer wood, definition 15 



color 17 



proportion in different parts of tree 15, 16 



of coniferous wood 17 



oak 19,21 



