Volume 28, Bulletins 346-362. (346) Test of the Performance of Portable Electric Mixers for Household Use; (347) Punched Card and Calculating Machine Methods for Analyzing Lattice Experiments Including Lattice Squares and the Cubic Lattice; (348) Domestic Spark Arresters; (349) Observations on Mold Development and on Deterioration in Stored Yellow Dent Shelled Corn; (350) Pattern of Farm Size Adjustment in Iowa; (351) Investigations in Seed Classification by Family Characteristics; (352) Soil Type and Soil Management Factors in Hemp Production; (353) Comparative Analysis of Red Fox Feeding Trends on Two Central Iowa Areas; (354); Composition of Hog Carcasses as Influenced by Heritable Differences in Rate and Ecomony of Grain; (355) Effectiveness of Roofing Nails for Application of Metal Building Sheets; (356) Changes in Iowa Popluation; (357) Effect of Time of Cutting Red Clover on Forage Yields, Seed Setting and Chemical Composition; (358) Breeding Behavior at Successive Generations Following Hybridization in Soybeans; (359) Effect of Injury Simulating Hail Damage to Soybeans; (360) Expansion of Vocational Education in Agriculture in Iowa; (361) Farm Ownership in the midwest; (362) Studies on the Forms and Availablity on Soil Organic Phosphorus; (363) Extent and Causes of Variability in Clinton Oats; (364) Farm Fence End and Corner Design