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Volume 20, Annual Issue (1913)

Front Matter

General Interest Article

Research

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Tramping in Western Washington p. 11-17
Thomas H. Macbride

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The Monterey Conifers p. 25
Thomas H. Macbride

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Sedges of Henry County p. 102-113
John Theodore Buchholz

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Phylogeny of the Araceae p. 160-168
James Ellis Gow

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Nitrogen in Rain and Snow: Second Paper p. 189-191
Nicholas Knight

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The Rock from Solomon's Quarries p. 192-192
Nicholas Knight

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Segregation of Fat Factors in Milk Production p. 193-198
F. B. Hills and E. N. Boland

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Helpful and Harmful Iowa Birds p. 295-298
Fred Berninghausen

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Nest Boxes for Woodpeckers p. 305-306
Frank C. Pellett

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Food Habits of the Skunk p. 307-310
Frank C. Pellett

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Additional Mammal Notes p. 311-312
T. Van Hyning

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Color Inheritance in the Horse p. 316-324
Edward N. Wentworth

Back Matter

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Author's Index p. 339-340