Teaching Students How to Conserve Energy. 405 



40-49 Forest Protection 

 40 — General 

 41 — Fire 



42 — Climatic Injuries 

 43 — Parasitic Plants, Fungi, Forest Weeds 



43.1— By Host Plants 



43.2 — By Species of Attacking Plants 



43.3 — By Groups, Regions, Gen. Reports 



43.4 — Forest Weeds 

 44 — Insects 



44.1 — By principal food plants 



44.2 — By species of common names 



44.3 — By Regions, Classes, or Groups 

 45 — Animals 

 46 — Storms, Wind 



47 — Avalanches, Floods, Erosion, Shifting Sand 

 48 — Smoke, Gases, Poisons 

 49 — Injuries by Man 



49.1 — Trespass 



49.2 — Improper Utilization 

 SO-59 Forest Management 

 50 — General 



51 — Forest Mensuration 

 52 — Forest Organization 



52.1 — Principles of Working Plans 



52.2 — Working Plans for Special Areas 

 53 — Forest Administration 

 54 — Forest Valuation 

 55 — Forest Finance 

 50-59 Wood Technology 

 60 — General 

 61 — Wood Technology 



61 -I — Wood Anatomy 



61.2 — Timber Physics 



61.3 — Seasoning 



61.4 — Durability 



61.5 — Heating Power 



61.6 — Defects 

 62 — Wood Chemistry 

 63 — Wood Preservation 

 64 — Wood Substitutes 

 TO-79 Forest Utilization and Exploitation 

 70 — General 

 71 — Encyclopaedia of Forest Products and By-products 



71.7 — By Species (alphabetically) 



71.2 — By Industries and Uses (alphabetically) 



71.3 — Grading and Inspection, Requirements of Trade 



71.4 — Stumpage and Lumber Prices 

 72— Logging 

 "^2, — Transportation 



74 — Saw-mills (Labor, Power and Machinery, Market, Costs) 

 75 — Other Wood Manufacturing Industries (alphabetically) 

 8o-8g Forest Economics 

 80 — General 



8r — History and Status of Forestry (country divisions) 

 82 — Forest Influences 

 83 — Forest Economics 

 84 — Forest Conditions (forest resources, growth, prices) 



