The Leguminosae of the North-Central United States. Duane Isley pages 439-182

Spring Waterfowl Migration Through Clay and Palo Alto Counties, Iowa. Fred A. Glover pages 483-492

On the Existence and Relative Stability of Hafnium Peroxide. Frederick R. Duke and Robert F. Bremer pages 493-494

Growth Studies of the Yellow Perch, Perca flavescens (Mitchill), In the Three Northwest Iowa Lakes. John W. Parsons pages 495-500

The Genus Setaria in Iowa. Richard W. Pohl pages 501-508

The Initiation of the Inflorescence in Bromus inermis (leyss). John E. Sass and Jane Skogman pages 513-520

Electrophoric Studies on Swine. II. The Composition of Plasma During Gestation and Lactation. Robert W. Freidell, Joseph F. Foster, Damon Catron, and Merwin R. Dieckmann pages 521-526