Volume 17, Bulletins 192-201. (192) Influences of Rations and Storage on the Physical Characteristics of Eggs; (193) Method of Analyzing the Effectiveness of Local Livestock Marketing Cooperatives in Selling Hogs; (194) External Measure of Egg Viscosity; (195) Pathological Relationship Between the Host and Parasite in Varieties and Strains of Watermelons Resistant to Fusarium Niveum E. F. S.; (196) Some Bacteriological and Chemical Effects of Calcium and Magnesium Limestones on Certain Acid Iowa Soils; (197) Effects of Liming on the Liberation of Potassium in Some Iowa Soils; (198) Leafy Spurge, Euphorbia Esula L.; (199) Some of the Factors Influencing the Infection and Pathogenicity of Ustilago Zeae (Beckm.) Unger on Zea Mays L.; (200) Possible Intermediate Step in the Reorganization of Rural Elementary Education in Iowa; (201) Northern Bob-White's Winter Territory