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Volume 29, Annual Issue (1922)

Front Matter

General Interest Articles

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In Memoriam: Fred C. Werkenthin; Chalmers Colin Norwood p. 32-38
John N. Martin and Ben Hur Wilson

Research

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The New Albin Inscribed Tablet p. 49-52
Ellison Orr

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Some Black River Brachiopods from the Mississippi Valley p. 67-83
Carroll Lane Fenton and Mildred Adams Fenton

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Pyrite in Coal p. 107-109
J. M. Lindly

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Winfield's Deep Well p. 110-112
J. M. Lindly

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The Structure of the Fort Dodge Beds p. 113-120
James H. Lees

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The Status of Sedimentation in Iowa p. 127-127
A. C. Trowbridge

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An Iowa Cambrian Eurypterid p. 127-128
O. T. Walter

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Origin of Limestone Conglomerates p. 128-128
Louise Fillman

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Classification of Lenses p. 128-128
Louise Fillman

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The Rockford Geodes p. 128-129
S. L. Galpin

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Solubility and Polarity p. 135-139
Wm. Kunerth

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Nodal Distances in Acoustics p. 149-149
G. W. Stewart

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Iowa Microlepidoptera p. 157-161
A. W. Lindsey

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A Study of the White Marked Tussock Moth p. 165-167
Susannah Poulter

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Behavior of Trapped and Banded Birds p. 225-228
Dayton Stoner

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Sociology as a Science p. 230-230
Hornell Hart

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Submarginal Venation of Foliage Leaves p. 233-237
Robert B. Wylie

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Some Wound Responses of Foliage Leaves p. 238-244
Robert B. Wylie

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Germination Studies of Some Shrubs and Trees p. 257-266
L. H. Pammel and C. M. King

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The Effect of Weeds upon Crop Production p. 271-279
A. L. Bakke and L. H. Pammel

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Description and Key of the Genus Cucurbita p. 281-290
Fred C. Werkenthin

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The Founders of the Art of Plant Breeding p. 291-310
Fred C. Werkenthin

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Parry's Catalog of Iowa Plants of 1848 p. 339-344
Winifred Ellsworth

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Electrometric Titration of Sulfurous Acid with Permanganate p. 361-364
W. S. Hendrixson and L. M. Verbeck

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The Electrometric Standardizing of Titanous Solutions p. 365-369
W. S. Hendrixson and L. M. Verbeck

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Studies of Yeast V - Is Bios a Single Substance p. 370-370
Ellis I. Fulmer and V. E. Nelson

Back Matter

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Index p. 373-379