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Volume 65, Annual Issue (1958)

Front Matter

General Interest Articles

Research

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Midwestern Population Studies of Viola papilionacea Pursh
Norman H. Russell and Jeanette Graham

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The Progression of Spring in Southeastern Iowa
Lloyd W. Biard and Carlo M. Ignoffo

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Iowa Diaportheae
J. C. Gilman and L. H. Tiffany

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Cholinesterase Inhibition in Vitro by Extracts of Potato
Wallace H. Orgell, Kunda A. Vaidya, and P. A. Dahm

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Growth and Differentiation of the Epidermal Wall
R. H. Schieferstein and W. E. Loomis

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Chemical Determination of Isoftavones
Edmund Cheng and Lester Yoder

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Recent Gypsum Exploration in Iowa
Fred H. Dorheim and Russell B. Campbell

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The Formation of Ice Platters
Robert Duncan Enzmann

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A Consideration of the Problem of Oriented Lakes
G. A. Rosenfeld and K. M. Hussey

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The Genesis of Pegrnatites
Robert Duncan Enzmann

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Use of Phosphates in Soil Stabilization
T. Demirel, J. V. Roegiers, and D. T. Davidson

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Comparison of Three Measures of Stuttering Severity
Dorothy Sherman, Martin Young, and Kenneth Gough

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Effect of Speed on Steering Efficiency
A. R. Lauer and Virtus W. Suhr

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A Procedure for Determining the Relative Volume of Mitochondria in Hepatic Cells
Paul A. Meglitsch, Leland P. Johnson, Rodney A. Rogers, Frances R. Rogers, and Alison M. Meglitsch

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Ectopia Cordis in a 35 Day Old Human Embryo
E. V. Enzmann, J. C. Luly, and S. D. Miroyiannis

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Pilot Knob Bog as a Habitat
Paul E. Smith and Richard V. Bovbjerg

Back Matter