Crowngall of Rumex crispus L. and Rheum rhaponticum L. H.H. Muncie pages 315-322

The Oxidation of Phenylmagnesium Bromide in the Presence of Tetraethyl Lead. Henry Gilman and J.A. Leerrmakers pages 323-324

Phosphorus Assimilation by Certain Soil Molds. P.E. Brown and F.B. Smith pages 325-330

The Biological Estimation of Glucose. I. A Study of Factors Influencing Changes in H-Ion Concentration. Amy Le Vesconte with J.H. Buchanan and Max Levine pages 331-342

The Normal Variability of the Sex-Ratio in the Guinea Pig. R. G. Schott and W.V. Lambert pages 343-350

The Effect of an Excess of Masgnesium on the Volume of Gas Liberated Incidental to the Preparation of Some Alkylmagnesium Halides. Henry Gilman and Robert. E. Fothergill pags 351-354

The Peparation of Furylacrylic Acid. Henry Gilman, R.E. Brown, G.F. Wright, and A.P. Hewlett pages 355-358

A Monograph of the Protozoa of the Large Intestine of the Horse. Ta-Shih Hsiung pages 359-424

Studies on the Nitrogen Fixation in Some Iowa Soils. R. H. Walker and P.E. Brown pages 425-430

The Variation of Hydrogen Ion Concentration with Carbon Dioxide Pressure Above One Atmosphere. I. Colorimetric Measurement. Marjorie B. Moore with J.H. Buchanan pages 431-440

The Properties of Starch with Relation of Time of Formation of Starch Gels. O.W. Chapman with J.H. Buchanan pages 441-450

The Biological Estimation of Glucose. II. The Relation Between Glucose Concentration and the pH Change in Media. Amy Le Vesconte with J.H. Buchanan and Max Levine pages 451-458

Determination of Organic Acids. II. Determination of Mixtures of Two Fatty Acids by Partition Between Ethyl Ether and Water. C.H. Werkman pages 459-464

The Esterase and Protease of Penicillium roqueforti. N.M. Naylor, L. Weisbrodt Smith, and Helen Jo Collins pages 464-471

Studies on the Insect Fauna of Iowa Prairies. George O. Hendrickson pages 49-180

Clarification of Milk for American Cheddar Cheese. G. Wilster pages 181-214

Experiments on the Physiological Relationships Between the Stomach Infusoria of Ruminants and Their Hosts, With a Bibliography. Elery R. Becker, J. A. Schulz, and M. A. Emmerson pages 215-252

The Pigeon Fly and Pigeon Malaria in Iowa. C.J. Drake and R. M. Jones pages 253-262

Studies of Crowngall, Overgrowths, and Hairyroot on Apple Nursery Stock. J. H. Muncie and Ross F. Suit pages 263-314

The Quantitative Determination of Formic Acid in the Presence of Acetic Acid by a Conductometric Titration. Edmond E. Moore with Ellis I. Fulmer pages 1-26

Some Correlations of Constitiution with Sweet Taste in the Furan Series. Henry Gilman and Amoit P. Hewlett pages 27-34

The Preparation of Furfural Diacetate. Henry Gilman and George F. Wright pages 35-36

Antiseptic Hypochlorite by Elctrolysis. R.L. Van Puersem, B.K. Pospishul, and W. D. Harris pages 37-48