Ivi CONTENTS 



PAGE 



Direct seeding work on the National Forests . 72 



Planting on the National Forests .... 78 



The Organization and Scope of Forest Experi- 

 ments and Investigations ....... 83 



The need of scientific experiments .... 83 



The science of growing timber . . .84 



Dendrological studies -86 



Seed studies . 87 



Nursery studies 88 



Forestation experiments 89 



Studies of forest influences 89 



Meteorological observations 91 



Forest management studies 92 



Forest protection studies 94 



^ Protection from grazing damage 95 



Protection from insects and diseases ... 96 



Tree studies 97 



"*" Grazing investigations 98 



Investigations dealing with poisonous plants and 



predatory animals 102 



National Forest utilization experiments . . .104 

 Forest Products Laboratory experiments . .108 



Industrial investigations 116 



III THE PROTECTION OF THE NATIONAL FORESTS . . 120 



Protection from Fire 120 



Forest Fire danger on the National Forests . 120 

 Importance of fire protection . . . . .121 



Causes of forest fires on the National Forests . 124 



Behavior of forest fires 126 



Losses by forest fires on the National Forests 126 



The forest fire problem stated 128 



Fire prevention .129 



Fire suppression 133 



How forest fire funds are distributed . . .134 



Forest fire history 136 



Relation of forest fires to the weather . . .137 

 Improvements and equipment for protection . 138 



Forest fire maps and charts 139 



Forest fire organization 140 



