•  
  •  
 

Volume 56, Annual Issue (1949)

Front Matter

General Interest Articles

PDF

Science Changes Its Mind p. 61-71
W. H. Kadesch

Research

PDF

Hysteriales of Iowa p. 147-157
Bernard Lowy

PDF

Iowa Pennsylvanian Goniatites p. 225-228
A. K. Miller

PDF

Pennsylvanian Charophyta in Iowa p. 233-233
Leo A. Thomas

PDF

Micropaleontological Zones in Iowa p. 235-240
L. A. Thomas and C. A. Balster

PDF

On Generalized Means p. 241-247
H. P. Thielman

PDF

Further Studies in Infant Speech p. 259-261
Orvis C. Irwin

PDF

Effect of So-called Night-driving Glasses on Visual Acuity - A Preliminary Study p. 263-270
A. R. Lauer, Edwin D. Fletcher, and Paul Winston

PDF

The Concept of Attitude p. 279-284
Dale Ortmeyer

PDF

Some Factors in the Academic Superiority of Veteran Students p. 285-288
William A. Owens and William A. Owens Jr.

PDF

Keeping Employees Informed p. 289-297
Joann Pitcher and Max E. Thompson

PDF

The Iowa Cooperative Fisheries Research Program p. 325-331
Kenneth D. Carlander

PDF

A Study of the Cardinal in Iowa p. 347-361
James Hodges

PDF

Mixed Colonies in Ants p. 367-370
Robert L. King

PDF

A Preliminary List of Hemerobiidae Known to Occur in Iowa p. 377-377
Donovan Orman and H. E. Jaques

PDF

A Preliminary List of the Dytiscidae Known to Occur in Iowa p. 397-398
J. C. Schaffner and H. E. Jaques

PDF

A Preliminary List of the Hydrophilidae Known to Occur in Iowa p. 399-400
S. S. Statler and H. E. Jaques

PDF

Notes on Ant-Lions p. 401-402
Richard F. Trump

Back Matter

PDF

Index p. 403-407