The Number of Stereoisomeric Alcohols. Edward S. Allen and Harvery Diehl pages 161-172

Properties of a Generalized Operator. Fred Robertson pages 173-188

Histogenesis in the Roots of Holcus sorghum L. Hsiu-Hui Chi pages 189-206

The Determination of the Total Fixed Nitrogen Content of Power Plant Flue Gasses. O.R. Sweeney, F.E. Cambell, and Burdette Jones pages 207-210

Preliminary Report on Iowa Mosquitoes. John A. Rowe pages 211-226

Activated Carbon from Certain Agricultural Wastes. T.R. McElhinney, B.M. Becker, and P. Burke Jacobs pages 227-240

A List of Chinese Miridae (Hemiptera) with Keys to Subfamilies, Tribes, Genera, and Species. Tsai Yu Hsiao pages 241-270

The Use of Fungi in Modern Genetical Analysis. Carl C. Lindegren pages 271-290

Levulose From Chicory, Dahlias, and Artichokes. E.S. Haber, W.G. Gaessler, and R.M. Hixon pages 291-298

Some Major Factors Affecting the Use of Two Inventory Methods Applicable to the Western Fox Squorrel, Sciurus Niger rufiventer (Geoffroy). Ellis A. Hicks pages 299-306

Nuclear Apparatus and Sexual mechanism in a Micrococcus. Carl C. Lindegren pages 307-318

Consolidation of Elastic Earth Layers. D.L. Holl pages 319-328

Two New Peruvian Tingitida (Hemiptera). Carl J. Drake and EJ. Hambleton pages 329-330