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Volume 18, Annual Issue (1911)

Front Matter

General Interest Articles

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In Memoriam: Samuel Calvin p. 11-12
Thomas H. MacBride, Melvin F. Arey, and William Harmon Norton

Research

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Asteroid, 1909, JA p. 13-14
Seth Nicholson and Alma M. Stotts

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Vaccination against Typhoid Fever p. 15-17
Henry Albert

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Flowers of Story County p. 19-24
J. M. Lindly

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Some Fungus Diseases of Trees p. 25-33
L. H. Pammel

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Pollination of Clover p. 35-45
L. H. Pammel and Charlotte M. King

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Studies in Variation of Red Clover p. 47-53
Edna C. Pammel and Clarissa Clark

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Notes on Iowa Saprophytes p. 57-60
Thomas H. MacBride

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Nitrogen in Rain and Snow p. 75-77
Nicholas Knight

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Graphics of Ore-Origin p. 95-98
Charles R. Keyes

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Notes on Some Iowa Reptiles p. 149-154
M. P. Somes

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Building a Museum p. 155-159
T. Van Hyning

Back Matter

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Index p. 160-161