Proceedings of the Iowa Academy of Science | Vol 81 | No. 3
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Volume 81, Number 3 (1974)

Issue cover date: September 1974

Front Matter

Research

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Bacteria of Foods and Utensils in the Luther College Food Service, Decorah, Iowa p. 93-97
Marilyn Peitso, Cheryl Anderson, and John Tjostem

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Video Tape Tutoring p. 98-99
J. W. Nilsson

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Thermal Structure of Clear Lake, Iowa p. 102-107
Roger W. Bachmann and Theodore V. Jacobsen

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Notes on Iowa Diatoms XII: Common Diatoms of Big Spirit Lake p. 108-110
Milbert Krohn, Michael Edwards, and John D. Dodd

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Some Temporal Factors in Visual Pattern Recognition. II p. 111-115
Lee S. Cohene and Harold P. Bechtoldt

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The Crinoid Genus Sygcaulocrinus from Iowa p. 116-118
Harrell L. Strimple

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Significance of Endothelial Cell Histidine Decarboxylase Activity p. 127-129
James R. Yarnal and Dennis F. Rolek

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Analytical Methods for Characterization of Fly Ash p. 130-134
Deniel C. Cavin, William A. Klemm, and George Burnet

Back Matter

Editors

Editor
T. E. Rogers
Associate Editors
Nels R. Lersten, Biological Sciences
James Mayhew, Conservation
Carol C. Oliven, Social Sciences
William R. Savage, Physical. Sciences and Mathematics
Lyle V. A. Sendlein, Geological Sciences