70 ECONOMIC WOODS OF THE UNITED STATES 



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GROOM, PERCY: A Preliminary Inquiry into the Significance of 

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LEE, H. N., AND SMITH, E. M.: Douglas Fir Fiber, With Special 

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RECORD, SAMUEL J. : The Significance of Resinous Tracheids, Bot. 

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SANIO, KARL: Ueber die Grosse der Holzzellen bei der Gemeinen 

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Wood Parenchyma (pp. 21-23) 



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Rays (pp. 23-29) 



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Resin Ducts (pp. 29-31) 



RECORD, SAMUEL J.: Intercellular Canals in Dicotyledonous 

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