The Physical-Chemical Properties of Alcohol-Gasoline Blends. III. The A.S.T.M. Distillation Curves and Reid Vapor Pressure. Leo M. Christensen, R.M. Hixon, and Ellis I. Fulmer pages 237-244

The Physical-Chemical Properties of Ethyl Alcohol Gasoline Systems. IV. Influence of Alcohol Concentration Upon Specific Volume, Fluidity, Air-to-fuel Ratio, Calorific Value, Latent Heat, and Fall in Temperature on Evaporation. Leo M. Christensen, R.M. Hixon, and Ellis I. Fulmer pages 245-250

A Botanical Survey of Lee County, Iowa. Jess L. Fults pages 251-294

Linkage Data on the R-g1 Chromosomes of Maize. J.B. Wentz and S.N. Smith pages 295-302

Irregular Sporogenesis and Polyembryony in Some Leguninosaw. John N. Martin and John R. Watt pages 303-309

Notes on the Immigrant Flora of Iowa, I. R.I. Cratty pages 309-312

Phyllophaga of Iowa. Bernard V. Travis pages 313-366