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WOOD MOST POPULAR AIRCRAFT MATERIAL ON A BASIS OF PURE ENGINEERING. 



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lumber retains place in automobile field. South. Lumberman 1770 : 211- 

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economic comparison of railway tie material. Engin. News 64 (20) : 540. 

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the prestige of wood. Gard. and Home Builder 45 (3) : 247-249, 324, illus. 

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the wood silo vs. substitutes. St. Louis Lumberman 56 (6) : 52-53. 1915. 



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redwood pipe proves its superior qualities. Timberman 20 (7) : 48, illus. 

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FOREST ECONOMICS 



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