Contents 



I. General Definition 7 



II. Relation of Forestry to Government 9 



III. Scope of Forestry as a Profession 11 



IV. American Forests 14 



V. Silvics 15 



The Forest versus the Single Tree 15 



Struggle for Moisture and Light and Its Effect on the Form of 



the Tree 16 



Early History of a Forest Stand 18 



The Forest Floor and Its Effect on the Soil 19 



Differentiation of Crown Classes 20 



Old Age of a Stand 21 



Silvical Characteristics of Tree Species 22 



Effect of Heat on the Distribution of Trees 23 



Soil Moisture and Its Relation to the Life of Trees 24 



Characteristics of Soils Affecting Soil Moisture 25 



Effect of Soil Moisture on Competition of Species 26 



Struggle for Light as Affecting Competition of Species 27 



Tolerance 28 



Indications of Tolerance in the Form of Trees 30 



Formation of Forests of Tolerant versus Intolerant Trees. . 30 



Duration of Life of Trees 32 



Reproduction of Trees and Stands. The Seed 33 



Distribution of Seed 33 



Extension of the Forest on to Abandoned Pastures 34 



The Seed Bed and the Seedling 35 



Reproduction by Sprouts 36 



Forest Types 37 



Basis for Distinguishing Types 39 



Forest Enemies. Fires 40 



Resistance of Trees to Fires 41 



Nature of Forest Fires and Their Effect on Forests 43 



Other Forest Enemies 44 



