This journal provides immediate access to some articles. Volume 11(5); May 1925 Astronomy The Frequency Distribution of Some Measured Parallaxes and of the Parallaxes Themselves PMCID: PMC1085957 The Effect of Varying Mass on a Binary System PMCID: PMC1085958 Mathematics Linear Connections of a Space Which Are Determined by Simply Transitive Continuous Groups PMCID: PMC1085950 Note on a Theorem by H. Kneser PMCID: PMC1085951 Associated Types of Linear Connection PMCID: PMC1085952 Conformal Correspondence of Riemann Spaces PMCID: PMC1085953 Pathology The Cultivation of Endamoeba Histolytica PMCID: PMC1085948 The Rat as a Possible Carrier of the Dysentery Amoeba PMCID: PMC1085949 Physics Pinhole Probe Measurements of the Phase Change of the Telephonic End Plates, Acting on a Closed Cylindrical Air Column in Longitudinal Acoustic Vibration PMCID: PMC1085954 On the Boltzmann Equation ρ = ρ0 exp (—w/kt) PMCID: PMC1085955 The Band Spectra of Crystals and Complex Gases PMCID: PMC1085956 Correction Projective Normal Coördinates for the Geometry of Paths PMCID: PMC1085959 Corrects: Projective Normal Coördinates for the Geometry of Paths. Proc Natl Acad Sci U S A. 1925 April; 11(4): 204–207. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||