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Volume 56, Annual Issue (1949)

Front Matter

General Interest Articles

Research

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Hysteriales of Iowa
Bernard Lowy

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Micropaleontological Zones in Iowa
L. A. Thomas and C. A. Balster

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On Generalized Means
H. P. Thielman

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Some Factors in the Academic Superiority of Veteran Students
William A. Owens and William A. Owens Jr.

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Keeping Employees Informed
Joann Pitcher and Max E. Thompson

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Mixed Colonies in Ants
Robert L. King

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Notes on Ant-Lions
Richard F. Trump

Back Matter