The Use of Alfalfa Extract to Supply Nutrients For the Growth and Chemical Activities of Acetobacter suboxydans. E.I. Fulmer, A.C. Bantz, and L.A. Underkolfer pages 369-376

The Fermentability of the Stereoisomeric 2,3-Butanediols by Acetobacter suboxydans. L.A. Underkolfer, E.I. Fulmer, A.C. Bantz, and E.R. Kooi pages 377-380

Flora of Alaska and Adjacent Parts of Canada II. J.P. Anderson pages 381-446

The Initiation and Development of Foliar and Floral Organs in the Tulip. J.E. Sass pages 447-456

The Strophiole and Other Seed Structures Associated With Hardness in Melilotus alba L. and M. officinalis Willd. J.N. Martin and J.R. Watt pages 457-470

Lygus Hahn, Six New Species From Western North America (Hemiptera, Miridae). Harry H. Knight pages 471-477