This journal provides immediate access to some articles. Volume 20(7); July 1934 Botany A Preliminary Revision of the Perennial Species of Eriophyllum PMCID: PMC1076432 Chemistry Observations upon Growth from the Viewpoint of Statistical Interpretation PMCID: PMC1076433 A Spectrographic Study of the Occurrence of Chromium and Molybdenum in Carcinoma of the Human Breast PMCID: PMC1076434 Genetics The Absence of Otonomy in the Development of the Effects of Certain Deficiencies in Drosophila melanogaster PMCID: PMC1076435 Geology and Paleontology New Creodonta from the Sespe Upper Eocene, California PMCID: PMC1076436 Mathematics A Note on Cremonia Transformations PMCID: PMC1076437 Distinct Groups Whose Subgroups Are Simply Isomorphic PMCID: PMC1076438 Locally Compact Abelian Groups PMCID: PMC1076439 Pathology and Bacteriology On Photosynthesis and Free Nitrogen Assimilation by Leguminous Plants PMCID: PMC1076431 Physics Suggestions as to the Energy-Momentum Principle in a Non-Conservative Mechanics PMCID: PMC1332641 Suggestions as to Metric in a Non-Conservative Mechanics PMCID: PMC1076441 The Temperature-Structure-Composition Behavior of Certain Crystals PMCID: PMC1076442 Physiology and Biochemistry The Production of the Crustacean Chromatophore Activator PMCID: PMC1076443 Psychology and Anthropology The Attributes of Tones PMCID: PMC1076444 Journal Matter Administrative content — journal masthead, notices, indexes, etc. | ||