This journal provides immediate access to some articles. Volume 13(7); July 1927 Anthropology The Architectural Evolution of Pueblo Bonito PMCID: PMC1085076 Astronomy Polarization of Light Reflected from Rough Surfaces with Special Reference to Light Reflected by the Moon PMCID: PMC1085069 The Trails of Two Periodically Flickering Meteors PMCID: PMC1085070 Botany The Embryology of Equisetum Debile Roxb PMCID: PMC1085074 The Effect of Small Amounts of Chemicals in Increasing the Life Activities of Plants PMCID: PMC1085075 Chemistry The Uni-Molecular Decomposition of Azo-Methane; the Adequacy of Activation by Collision PMCID: PMC1085071 On X-Ray Diffraction Patterns from Liquids and Colloidal Gels PMCID: PMC1085072 Pathology The Effect of Tubercle Bacilli and the Chemical Fractions Obtained from Analysis on the Cells of the Connective Tissues in Rabbits PMCID: PMC1085073 Physics Zeeman Effect and Structure in the Spark Spectra of Tin PMCID: PMC1085060 The Structure of Certain Bands in the Visible Spectrum of Boron Monoxide PMCID: PMC1085061 Pressure Phenomena of the Mucronate Anode PMCID: PMC1085062 On the Lag of the Kerr Effect PMCID: PMC1085063 Mobilities of Ions in Acetylene Hydrogen Mixtures PMCID: PMC1085064 Current Distribution in Supraconductors PMCID: PMC1085065 On the Reflection of Electrons from Crystal Lattices PMCID: PMC1085066 Displacement of Certain Multiplets and Multiple Levels for Elements in the First Long Period PMCID: PMC1085067 Energy Relationships and Ionization Potentials of Atoms of the First Row of the Periodic Table in All Stages of Ionization PMCID: PMC1085068 Zoölogy Additional Evidence as to the Intercellular Formation of Connective Tissue PMCID: PMC1085057 Results of Heteroplastic Transplantations of the Heart Rudiment in Amblystoma Embryos PMCID: PMC1085058 Vision and Retinal Structure in Mice PMCID: PMC1085059 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||