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Volume 58, Annual Issue (1951)

Front Matter

General Interest Articles

Research

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The Flora of Iowa County p. 71-95
Nathan W. Easterly

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Astraeus and Geastrum p. 97-99
Marion D. Ervin

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A study of Chaetomium in cellulose decay p. 101-106
Wendall M. Farrow

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The Flora of Cedar County, Iowa p. 107-131
Marcus J. Fay

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Studies on Fungal Membranes p. 165-171
Lawrence Kaplan

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The Numbers of Fungi p. 175-178
G. W. Martin

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Herbarium of the State University of Iowa p. 215-219
Robert F. Thorne

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The Absorption Spectra of Derivatives of Phthalic Anhydride p. 251-260
Calvin Hanna and W. T. Smith Jr.

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Electron Emission from a Carbon Surface p. 261-264
Alvin E. Walz and George Glockler

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Vitamin B12 Content of Kidneys as Determined by Different Bioassay Procedures p. 265-274
Edmund Wei-Kuang Cheng and Byron H. Thomas

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The Campbell Micro-Fossil Washer p. 275-277
Carlyle B. Campbell

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Use of the Morphology of Buried Soil Profiles in the Pleistocene of Iowa p. 295-306
W. H. Scholtes, R. V. Ruhe, and F.F. Riecken

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Theorem on the Zeros of Polynomials p. 311-312
Wm. J. Stoner

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The Role of Albedo in Color Discrimination of Spider Monkeys p. 321-330
Robert Q. Easter and Daryl G. Nichols

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Comparison of Form and Color Fields p. 351-356
Harold V. Gaskill Jr., Albert G. Rostenbach, and Robert M. Thompson

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Rate of Manipulative Learning as a Function of Goal-Setting Techniques p. 357-362
Gerald C. Helmstadter and Douglas S. Ellis

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Some Effects of Color on Perception of Relative Motion at Night p. 363-369
Donald A. Hoppe and A. R. Lauer

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Making Accident Statistics More Meaningful p. 375-383
Pearl W. McMurray and A. R. Lauer

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Some Components of Mechanical Composition p. 385-389
Gilbert E. Miller

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Some Social Correlates of Intellectual Changes p. 391-396
Dale Ortmeyer and William A. Owens Jr.

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The Scotometer - A Dark-Tunnel Apparatus For Studying Night Vision of Drivers p. 397-400
Harold I. Stalder, Donald A. Hoppe, and A. R. Lauer

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An Analysis of Reading Improvement p. 401-404
Lewis R. Vavra

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Preliminary Report on the Distribution of Bottom Organisms in West Lake Okoboji, Iowa p. 405-414
John E. Bardach, John Morrill, and Frank Gambony

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A Lead Destroying Ant from Panama p. 449-450
E. V. Enzmann

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More Mixed Colonies in Ants p. 487-489
R. L. King and R. M. Sallee

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The Production of Ring-necked Pheasants in Winnebago County, lowa p. 491-495
E. L. Kozicky and G. O. Hendrickson

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Hydra in an Iowa Nursery Lake p. 501-505
Tom Moen

Back Matter

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Index p. 567-573