Front Matter
p. 0
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Geologic Section of the Chillicothe Test-Core
Carman, J. Ernest pp. 49-54
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Waynesburg Coal in Harrison and Northern Belmont Counties, Ohio, and Revision of Dunkard (Permian) Boundary
White, George W. pp. 55-58
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Production of Balanced Square Waves for Electronic Stimulation
Goldston, Leo S.; Miller John A. pp. 59-61
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Book Notices
p. 61
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What is Emotion?
English, Horace B. pp. 62-66
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Book Notices
p. 66
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Ohio Robber Flies IV (Diptera: Asilidae)
Bromley, Stanley W. pp. 67-68
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New North American Coleoptera) (Buprestidae, Schizopodidae and Cerambycidae)
Knull, Josef N. pp. 69-73
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Bactericidal Effect of the War-Time Penny
Gerberich, John B. pp. 74-75
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New Fulgoroidea from North America (Homoptera)
Caldwell, John S. pp. 76-78
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Otodistomum Plicatum N. Sp. (Trematoda, Digenea) from Hexanchus Griseus (Bonnaterre)
Kay, Maire Weir pp. 79-83
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A Systematic Study of the Main Arteries in the Region of the Heart--Aves V--Sphenisciformes. Part 2
Glenny, Fred H. p. 84
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Some Algae, Including New Species, from New Mexico
Taft, Clarence E. pp. 85-87
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Book Notices
p. 88
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Back Matter
p. 999
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