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The Role of Eye Movement Habits in Determining Reading Efficiency p. 231-235
Francis P. Robinson

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Discrimination of Relatively Pure Spectral Colors by Normal and Color-Blind Subjects p. 148-148
A. A. Benedict

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Is There a Deficiency of Available Potassium in So-Called Alkali Soils of Iowa? p. 133-137
Hartzell C. Dean

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In Memoriam: George Ellsworth Thompson; Stephen J. Popoff; Samuel Walker Beyer; Johan Augustus Udden; William Ernest Andrew Slaght; Merrill M. Meyers p. 20-30
L. B. Spinney, Edward Bartow, C. S. Gwynne, W. H. Norton, Christian A. Ruckmick, and James H. Lees

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Index

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Officers, Committees, Past Presidents, and Members, Iowa Academy of Science p. 4-16

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Structure of the Des Moines Series at Redfield, Iowa p. 127-130
C. S. Gwynne

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A Preliminary Study of Some Herbicides on Dandelions p. 67-72
L. E. Arnold

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Proceedings of the Forty-Seventh Annual Meeting of the Iowa Academy of Science, Held at Cedar Rapids, April 21 and 22, 1933: Minutes of the Meeting; Staff & Committee Reports p. 11-23

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Table of Contents p. 3-7