WORLD MOVEMENT OF MINERALS 383 Movement of minerals under pre-war conditions of international trade 385 Changes during the war 385 Post-war condition of the mineral trade 387 TENDENCIES TOWARD INTERNATIONAL COOPERATION AND POSSIBILITY OF INTERNATIONAL CONTROL OF MINERALS 389 Methods of international cooperation 391 CONSERVATION IN ITS INTERNATIONAL RELATIONS 393 EXPLORATION IN ITS INTERNATIONAL RELATIONS 395 VALUATION IN ITS INTERNATIONAL RELATIONS 396 RELATIVE POSITION OF THE UNITED STATES IN REGARD TO SUPPLIES OF MINERALS 396 THE COAL AND IRON SITUATION OF WESTERN EUROPE UNDER THE TERMS OF THE PEACE 400 CONCLUSION 403 LITERATURE 403 CHAPTER XIX. GEOLOGY AND WAR 405 GEOLOGY BEHIND THE FRONT 405 GEOLOGY AT THE FRONT 408 EFFECT OF THE WAR ON THE SCIENCE OF ECONOMIC GEOLOGY 412 CHAPTER XX. GEOLOGY AND ENGINEERING CONSTRUCTION 413 FOUNDATIONS 413 SURFACE WATERS 414 TUNNELS 414 SLIDES 415 SUBSIDENCE 417 RAILWAY BUILDING 417 ROAD BUILDING 418 GEOLOGY IN ENGINEERING COURSES 419 CHAPTER XXI. THE TRAINING, OPPORTUNITIES AND ETHICS OF THE ECONOMIC GEOLOGIST 420 PURE VERSUS APPLIED SCIENCE 420 COURSE OF STUDY SUGGESTED 422 Field work 425 Specialization in studies 426 A degree of Economic Geology 427 THE OPPORTUNITIES OF THE ECONOMIC GEOLOGIST 428 ETHICS OF THE ECONOMIC GEOLOGIST 430 ILLUSTRATIONS FIGURE PAGE 1. Graphic representation of volume change in weathering of a Georgia granite 21