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A Preliminary Study of the Causes that produce "Bald-headed" Kelp
Vol 9, Iss 1, Page 1
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A List of the Described Species of Fossil Amphibia
Vol 9, Iss 2, Page 11
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On the Anatomy of Grindelia squarrosa
Vol 9, Iss 3, Page 29
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A Study of the Histological Variations of Quercus muhlenbergii
Vol 9, Iss 4, Page 43
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A Comparative Anatomical Study of Some Species of Xanthium
Vol 9, Iss 5, Page 55
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On Cubic Surfaces and Their Nodes
Vol 9, Iss 6, Page 67
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A Contribution to the Subject of the Factors Concerned in Soil Productivity
Vol 9, Iss 7, Page 79
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Some Methods of Embryological Technique
Vol 9, Iss 8, Page 101
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Wax Reconstructions of the Brain of an Embryo Lizard, Eumeces
Vol 9, Iss 9, Page 109
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A Study of the Dimensions of the Chromosomes of the Somatic Cells of Ambystoma
Vol 9, Iss 10, Page 117
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The Number of Spermatozoa in Relation to Sertoli Cells
Vol 9, Iss 11, Page 129
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Studies upon the Number of Germ Cells in Certain Fishes
Vol 9, Iss 12, Page 141
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A Preliminary Report on the Infusoria of Kansas
Vol 9, Iss 13, Page 145
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The Development of a Tunicate without Nerves
Vol 9, Iss 14, Page 175
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The Influence of Light on Reproduction in Vorticella
Vol 9, Iss 15, Page 181
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Some Methods of Studying Fossil Amphibia Embedded in Coal
Vol 9, Iss 16, Page 185
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The Effect of Physical Fatigue on Mental Efficiency
Vol 9, Iss 17, Page 195
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A Study of the Germ Cells of Corymorpha palma
Vol 9, Iss 18, Page 245
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Histology of Malva rotundifolia
Vol 9, Iss 19, Page 259
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Differentiation of the Oaks by Histological Methods
Vol 9, Iss 20, Page 269
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Anatomy of Platanus occidentalis
Vol 9, Iss 21, Page 279