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Volume 57, Annual Issue (1950)

Front Matter

General Interest Articles

Research

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Some Responses of Black Locust to Planting Site Treatment p. 73-90
George R. Cooper and J. M. Aikman

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Lophotrichus as a Cellulolytic Genus p. 143-148
Thomas J. Bulat

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Exploratory Studies on the Constituents of Scoparia dulcis (Linn) p. 161-164
Watler M. Budde and R. L. Shriner

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An Empirical Titrimetric Method for the Determination of Beryllium p. 193-201
John H. McClure and Charles V. Banks

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Mechanism of Salivary Amylase Action p. 203-209
John H. Pazur, Dexter French, and Doris W. Knapp

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The Formation of Morpholine Thiosulfate From Morpholine and Sulfur p. 211-213
Edward M. Peters and Watler T. Smith Jr.

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The Huggins Test for Cancer and Related Protein Determination p. 215-223
Hjalmer V. Peterson and Harold W. Morgan

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Infrared Spectrum and Structure of Ethylene Imine p. 235-239
George E. Evans and Tice Hoffman

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Glaciated Surfaces in Central Iowa p. 245-252
Charles S. Gwynne

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Causes of Differences in Soil Series of the Missouri River Bottomlands of Monona County p. 253-258
J. E. McClelland, E. M. White, and F. F. Riecken

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An Upper Silurian Vertebrate Horizon p. 271-275
George M. Robertson

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Some Observations of the Paha of Northeast Iowa p. 283-291
W. H. Scholtes and Guy D. Smith

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Bernoulli Numbers p. 315-319
R. B. McClenon

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Measures for Predicting Calculus Achievement p. 321-325
Orlando C. Kreider

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Structure of BaTiO3 p. 331-336
Edward G. Grimsal

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Diamond Conduction Counters p. 337-346
Robert K. Willardson

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Reliability of the O'Connor Block Test p. 353-356
Richard H. Bunch, R. N. Kjerland, and A. R. Lauer

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An Empirical Study of Scoring Methods for the Conover Driving Attitude Inventory p. 385-386
T. E. Hannum, Gerald C. Helmstadter, A. R. Lauer, and David H. Soule

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A Forced-Choice Rating Scale for College Instructors p. 399-406
A. R. Rustebakke, George D. Lovell, and Charles F. Haner

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Changes in Vision as a Result of Hypnotic Age Regression p. 425-427
William H. Roberts and Duane Black

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Further Studies of the Modified Denil Fishway in the Des Moines River p. 449-456
Harry M. Harrison and Everett B. Speaker

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Anomaly of the Cat p. 465-466
Robert H. LaBlanc

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Population of a Colony of Formica Rufa Melanotica Emery p. 469-473
Robert L. King and Francis Walters

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Experiments on the Chemotherapy of Blackhead in Turkeys p. 475-482
Neal F. Morehouse and Willis C. McGuire

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The Professional Status of the Biologist p. 499-503
Frank M. Semans

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Activity Patterns of Some Clear Lake, Iowa, Fishes p. 511-518
James G. Sieh and John Parsons

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A Preliminary List of the Rhagionidae (Diptera) Known to Occur in Iowa p. 529-530
Keith L. Rhodebeck and D. D. Millspaugh

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A Preliminary List of the Gyrinidae (Coleoptera) Known to Occur in Iowa p. 531-532
J. C. Schaffner and D. D. Millspaugh

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Home Range of the Southern Woodchuck p. 537-540
Richard F. Trump

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A Preliminary List of the Buprestidae (Coleoptera) Known to Occur in Iowa p. 541-543
Edwin S. Kajihiro and D. D. Millspaugh

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A prelilninary List of the Calliphorinae (Diptera) known to occur in Iowa p. 545-547
Carl M. Yoshimoto and D. D. Millspaugh

Back Matter

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Index p. 549-554