Function of Vitamin B1 in Anaerobic Bacterial Metabolism. M. Silverman and C.H. Werkman pages 107-114

The Dehydration of Cholesterol. J.C. Eck and Ralph L. Van Peursem pages 115-128

Reuteria Puton; Four New Species from the United States (Hemiptera Miridae). Harry H. Knight pages 129-134

High Molecular Weight Fatty Acid Derivatives I. Characterization of Acids. henry Gilman and Grover M. Ford pages 135-148

Studies on the Fat of Chedder Cheese. C.B. Lane and B.W. Hammer pages 149-156

Pressure-Aeration Effects on the Dissimilation of Glucose by Aerobacter Indologenes. M.N. Mickelson and C.H. Werkman pages 157-160

Decomposition and Gas Production of Cornstalks Under Anaerobic Conditions at 28 to 30 Degrees Celsius. G.H. Nelson, Robert P. Straka, and Max Levine pages 161-180

New Species of Psyllidae from the Western United States. L.D. Tuthill pages 181-186

A Comparison of Spring Migrations of Some Birds Through Clay and Palo Alto Counties, Iowa. Jessop B. Low pages 187-200

The Cicindelidae of Iowa. (Coleoptera). Dean E. Eckhoff pages 201-230