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 How fires are located 142 The fire fighting organization 144 Forest fire coöperation 146 Fighting forest fires 147 Protection Against Trespass, Forest Insects, Erosion, and Other Agencies 150