x CONTENTS 



16. Sedimentation in Harbors 291 



Joseph M. Caldwell 



17. Contribution of Model Analysis to the Solution of Shoaling Prob- 



lems 300 



C. B. Patterson and H. B. Simmons 



18. Stream-Channel Control 319 



Stafford C. Happ 



19. Debris Control 336 



Burnham H. Dodge 



20. Sedimentation in Reservoirs 347 



Albert S. Fry 



21. Problems of Irrigation Canals 364 



Alfred R. Golze 



22. Effects of Soil Conservation 380 



Carl B. Brown 



23. The Problem of Gullying in Western Valleys 407 



H. V. Peterson 



PART 4. APPLICATIONS INVOLVING NATURE OF CONSTITUENTS 



24. Influence of Sedimentation on Concrete Aggregate 437 



Roger Rhoades 



25. Application of Studies of the Composition of Clays in the Field 



of Ceramics 464 



Ralph E. Grim 



26. Foundry Sands 475 



H. Ries 



PART 5. ECONOMIC MINERAL DEPOSITS 



27. The Field of Economic Geology of Sedimentary Mineral Deposits 485 



V. E. McKelvey 



28. Sedimentary Iron Deposits 506 



Stanley A. Tyler 



29. Sedimentary Rocks as Hosts for Ore Deposits 524 



John S. Brown 



30. Geochemical Prospecting for Ores 537 



H. E. Hawkes 



PART 6. PETROLEUM GEOLOGY PROBLEMS 



31. Subsurface Techniques 559 



Daniel A. Busch 



32. Porosity, Permeability, and Capillary Properties of Petroleum 



Reservoirs 579 



Charles D. Russell and Parke A. Dickey 



33. Carbonate Porosity and Permeability 616 



W. C. Imbt 



