CONTENTS 



Par« 



Eric Outlook System, i 



By F. B. Knapp. 

 The Preservative Treatment of Wood, 



L The \'alidity of Certain Theories Con- 

 cerning the Penetration of Gases and 

 Preservatives into Seasoned Wood, 5 



By I. W. Bailey. 

 The Preservative Treatment of Wood, 



fl. The Structure of the Pit Membranes in 

 the Tracheids of Conifers and their Re- 

 lation to the Penetration of Gases, 

 Liquids, and Finely Divided Solids into 

 Green and Soa'^oned Wood, 12 



By I. W. Bailey. 

 Method for Regulating the Yield in Selection Forests, 21 



By Walter J. Morrill. 

 South Dakota School Lands, 28 



By Paul D. Kelleter. 

 Probable Evolution in the Sawmill Industry, 35 



By Burt P. Kirkland. 

 Some Aspects of European Forestry, 41 



By A. B. Recknagel. 

 Let's Not Overlook the Woodlots, 58 



By Alfred Gaskill. 

 Disengagement Cuttings in Mixed Small Sapling 



Stands, 62 



By W. D. Sterrett. 

 Northern Limits of East Canadian Trees in Relation 



to the Climate, 64 



By H. R. Christie. 

 Concerning Seed Spots, 67 



By J. A. Larsen and R. J. Smith. 

 Current Literature, 69 



Other Current Literature, 81 



Periodical Literature, 86 



Other Periodical Literature, 122 



News and Notes, 124 



Comment, 132 



