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Volume 9, Annual Issue (1901)

Front Matter

General Interest Articles

Research

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Factors of Extinction p. 47-52
Herbert Osborn

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Forestry in Iowa p. 53-61
B. Shimek

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The Chemical Composition of Sewage of the Iowa State College Sewage Plant p. 70-81
J. B. Weems, J. C. Brown, and E. C. Myers

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Calcium Carbide as a Dehydrating Agent for Alcohols p. 86-90
Alfred N. Cook and Arthur L. Haines

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The Sioux City Water Supply p. 90-101
Alfred N. Cook and C. F. Eberly

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A Large Red Hydra p. 125-126
Maurice Ricker

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Ustilaginae of Iowa p. 226-240
H. H. Hume

Back Matter

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Index p. 241-244