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Volume 25, Annual Issue (1918)

Front Matter

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Title Page p. 1-1

General Interest Articles

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In Memoriam: J. Howard Frazier; Glenn I. Tenney; Robert B. Dodson p. 21-29
L. H. Pammel, A. O. Thomas, and G. W. Stewart

Research

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Stroboscopic Velocities in the Tonoscope p. 49-57
H. R. Fossler and L. E. Dodd

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Pharyngeal Derivates of Amblystoma p. 111-116
Francis Marsh Baldwin

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The Influence of Floods upon Animals p. 155-174
D. M. Brumfiel

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A Long-Lifed Woodboring Beetle p. 176-176
H. E. Jaques

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The White Waterlily of McGregor, Iowa p. 235-236
Henry S. Conard

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A Variation in the Black Walnut p. 241-247
L. H. Pammel and Charlotte M. King

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An Annual White Sweet Clover p. 249-257
L. H. Pammel and Charlotte M. King

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The Fern Flora of Northeastern Iowa p. 417-421
T. J. Fitzpatrick

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Pioneer Plants on a New Levee - IV p. 423-425
Frank E. A. Thone

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Plants of Southeastern Alaska p. 427-449
J. P. Anderson

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The Oil in Cherry Pits p. 451-455
Harold L. Maxwell and Nicholas Knight

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Some Problems of Water Supply for Troops p. 457-476
Jack J. Hinman Jr.

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The Composition and Digestibility of Sudan Grass Hay p. 479-489
W. G. Gaessler and A. C. McCandlish

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Some Improved Laboratory Methods p. 497-500
W. S. Hendrixson

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Milk as the Sole Diet of Ruminants p. 505-515
A. C. McCandlish

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Pre-Glacial Moingona River p. 551-559
Charles Keyes

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Alpine Structures of Jasper Park p. 561-568
Charles Keyes

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Park Sites along Des Moines Valley p. 569-585
James H. Lees

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The Ste. Genevieve Marls near Fort Dodge and Their Fauna p. 599-616
James H. Lees and A. O. Thomas

Back Matter