The Food and Cover relationship in the Winter Survival of the Ring-necked Pheasant, Phasianus colchicus torquatus Gmelin, in Northern Iowa. William Edward Green pages 285-314

Buckling Loads for Edge Loaded Clamped Plates. Donald H. Rock pages 315-320

A Flora of Winneshiek and Allamakee Counties and Clayton County in the Vicinity of McGregor. William L. Tolstead pages 321-384

A Colorirmetric Method for the Microdetermination of Diacetyl. E.A. Prill and B.W. hammer pages 385-396

Cytologial and Morphological Features Associated with Impotency of Pollen of the Winesap Apple. John N. Martin pages 397-404

The Influence of the Ration on Mortality from Caecal Coccidiosis in Chicks. Elery R. Becker and Philip C. Waters pages 405-414