This journal provides immediate access to some articles. Volume 12(3); March 1926 Biochemistry Studies on Biochemical Differences between (+) and (-) Sexes in Mucors: 2. A Preliminary Report on the Manoilov Reaction and Other Tests PMCID: PMC1084486 Biochemical Differences between Sexes in Green Plants PMCID: PMC1084487 Botany The Mucor Parasite Parasitella in Relation to Sex PMCID: PMC1084488 Chemistry Formation of Ozone by Optically Excited Mercury Vapor PMCID: PMC1084481 Diffusion of Electrons PMCID: PMC1084482 Genetics Correlation between Shape and Behavior of a Chromosome PMCID: PMC1084483 The Genetic Basis of Susceptibility to Tissue Transplants PMCID: PMC1084484 Mathematics On Various Geometries Giving a Unified Electric and Gravitational Theory PMCID: PMC1084485 Physics Resonant Acoustic and Electric Oscillations Released by the Relatively Slow Spring Break PMCID: PMC1084472 On the Reflection by a Crystal of Its Own Characteristic Radiation PMCID: PMC1084473 Note on the “Selective Reflection” of X-Rays by Crystals of Potassium Bromide PMCID: PMC1084474 Systematic Relations between Electronic Structure and Band-Spectrum Structure in Diatomic Molecules: I PMCID: PMC1084475 Systematic Relations between Electronic Structure and Band-Spectrum Structure in Diatomic Molecules: II. The ZnH, CdH and HgH Molecules and Their Spectra PMCID: PMC1084476 The Electronic States of the Helium Molecule PMCID: PMC1084477 Variations in the Photo-Electric Sensitivity of Platinum PMCID: PMC1084478 Radiation and the Disintegration and Aggregation of Atoms PMCID: PMC1084479 A New Kind of Test of the Correspondence Principle Based on the Prediction of the Absolute Intensities of Spectral Lines PMCID: PMC1084480 Physiology The Physiological Principle of Minimum Work: I. The Vascular System and the Cost of Blood Volume PMCID: PMC1084489 The Significance of Changes in the Electrical Resistance of the Body during Sleep PMCID: PMC1084490 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||