Harold Hotelling

On the basis of the model of the water molecule derived from spectral and x-ray data and a proposed internal structure for water, the following properties of water and ionic solutions have been deduced quantitatively in good agreement with experiment....

Rebecca C. Lancefield

The method used by Hylleraas in treating the He atom has been extended to the H2 molecule. The method consists of setting up a wave function as a series in the five variables required, electronic separation being introduced explicitly as one of the variables....

Thomas M. Rivers, Douglas H. Sprunt, G. P. Berry

Charles S. (Charles Sanders) Peirce, Charles Hartshorne, Paul Weiss

Pascual Jordan, John von Neumann, E. P. Wigner

Friedrich A. von (Friedrich August) Hayek, Nicholas Kaldor, H. M. Croome

It is shown that the ultraviolet absorption of NaCl, KCl and KI, which one may estimate from recent experimental work, is in agreement with the dispersion of these salts. With these assumed absorption curves, the dipole‐dipole potential constant for...

An instance is recorded, in a male infant dying at the age of three months, of an abnormal origin of the left coronary artery from the pulmonary artery, associated with marked enlargement of the heart (due to hypertrophy and dilatation of the left ventricle),...

The secular equations corresponding to the five canonical structures for benzene and the forty‐two for naphthalene, considered as six and ten‐electron systems, respectively, are set up and solved with certain simplifying assumptions, leading to energy...

By the employment of injection methods, it has been possible to demonstrate vascular communications between the coronary arteries and the chambers of the heart. Serial sections and wax-plate reconstructions of these communicating vessels revealed two...

A higher hydrocarbon, such as tetradecane, on the surface of water forms a circular lens. The condition for the formation of such stable lenses is that the spreading coefficient FS = γ1 — γ2 — γ12 shall be negative. As the volume of the oil lens...

Starting from the discovery by Rumer that the eigen‐functions corresponding to different distributions of valence bonds in a molecule can be represented by plane diagrams which provide information regarding their mutual linear independence, a very simple...

The constants of the empirical repulsion potential assumed by Born and Mayer between two ions, which may be termed the ionic ``radii,'' are calculated for the alkali and halide ions from the lattice constants of the alkali halides. By using 9 such radii...

R. Margaria, H. T. Edwards, D. B. Dill

Richard E. Shope, E. Weston Hurst

LeRoy D. Fothergill, Joyce Wright

The virial theorem can be applied to a molecule, assuming that external forces are applied to keep the nuclei fixed. The mean electronic kinetic energy is then the negative of the mean total internal energy, plus a term arising from the virial of the...

A simple wave function for the normal state of the hydrogen molecule, in which both the atomic and ionic configurations are taken into account, was set up and treated by a variational method. The dissociation energy was found to be 4.00 v.e. as compared...

The minimum audible field (M.A.F.) has been determined from data taken on 14 ears over the frequency range from 100 to 15,000 c.p.s. The observer is placed in a sound field which is substantially that of a plane progressive wave, facing the source and...

Analyse des rapports sociaux a la cour de France sous l'Ancien Regime. - These de sociologie redigee par l'auteur en vue de son habilitation a l'Universite de Francfort-sur-le-Main. - La prise du pouvoir par les nazis empecha l'auteur de la soutenir en...

John Bradshaw Taylor, Irving Langmuir

The primary purpose of the present series of papers is to give more explicit mathematical form to the theory of Mulliken and Hund, and in some instances to the alternative theories of Pauling and Slater and of Heitler and Rumer, for valence in carboncompounds....

An investigation of a large group of related airfoils was made in the NACA variable-density wind tunnel at a large value of the Reynolds number. The tests were made to provide data that may be directly employed for a rational choice of the most suitable...

With the use of wave functions constructed from hydrogen‐like single‐electron functions with an effective nuclear charge Z, the application of the variation method of treating the wave equation for the normal state of He2 +, involving a three‐electron...

Eugene M. Landis, H John Gibbon

James A. Clarkson, C. Raymond Adams

The summations of state and free energies of the molecules H2 1, H2 2 and H1H2 have been calculated at temperatures from 20.4 to 700°K and their dependence on the spin and statistics of H2 discussed and illustrated. The equilibrium constants of the reaction...

In the present paper a mechanism of diffusion and electrolyticconduction in solids is discussed, which is based on a formal treatment given by Frenkel. It is assumed that in a crystal in thermal equilibrium some of the atoms or ions are removed from their...

Using previously reported data (Phys. Rev., Vol. 31, May, 1928) concerning the differential intensity sensitivity of the ear, the number of perceptible increments of intensity is calculated as a function of the intensity expressed in db above the auditory...

By considering each mass in a linear mechanical system as having two terminals, one fixed in the mass and one fixed to the frame of reference, every linear mechanical system is reduced to a multiplicity of closed mechanical circuits to which, force and...

STUDIES ON A CERTAIN SPREADING FACTOR EXISTING IN BACTERIA AND ITS SIGNIFICANCE FOR BACTERIAL INVASIVENESS.

Lack of uniformity of opinions concerning the development of the vag ina prompted an investigation into the successive stages of the vaginas developmental events. Observations on the material studied indicated: 1) that the upper part of the vagina develops...

Robert F. Loeb, Dana W. Atchley, Ethel M. Benedict

The mechanism of the decomposition of a molecule formed by the collision between a molecule and another particle is discussed qualitatively. Calculations are then carried through to determine the lifetime of a simple linear triatomic molecule formed by...

The lattice energies and lattice constants of the silver and thallium halides are calculated assuming ionic crystals with a van der Waals potential. The latter term, which is large, accounts for the low solubilities (high lattice energies) of the salts....

To verify the results of their 1932 study, which indicated that "hexuronic acid" was in fact vitamin C, Szent-Gyorgyi and Svirbely ran additional tests with guinea pigs, using vitamin C derived from a new source, the red peppers used to make paprika...

Theory. The approximate construction, for shared electrons in molecules RX n , of molecular orbitals (``orbital'' means one‐electron orbital wave function) as linear combinations of atomic orbitals is discussed and illustrated by equations for RX2,...

Transport Phenomena in Einstein-Bose and Fermi-Dirac Gases. II

The factors that control the distribution of heavy minerals in natural sandstones are so numerous and complex that their separate effects are difficult or even impossible to untangle. However, a theoretical approach to the problem indicates something...

Part I of this paper first describes a method of measuring attenuation and field strength in the ultra-short-wave range. A resume of some of the quantitative experiments carried out in the range between 17 megacycles (17 meters) and 80 megacycles (3.75...

Marie Jean Antoine Nicolas Caritat Condorcet

The probability function of Menke has been used as a basis for a statistical treatment of the intermolecular potentials in solutions of symmetrical molecules for which the entropy of mixing is the same as for an ideal solution of the same composition....

The calculation of the width and shape of a line which is broadened because of predissociation has been extended so as to include perturbations of intermediate size. By ``perturbations of intermediate size'' we mean perturbations which are not so great...

G. W. Bartelmez, Normand Louis Hoerr

Progressive application of the Kutta-Joukowsky theorem to the relationship between airfoil lift and circulation affords a number of formulas concerning the conduct of vortex systems. The application of this line of reasoning to several problems of airfoil...

Stephen S. Hudack, Philip D. McMaster

1. 1. The several methods proposed for the determination of the velocity of blood flow or circulation time and the results obtained are reviewed.2. 2. A simple procedure utilizing the injection of sodium dehydrocholate (decholin-sodium) is outlined for...

The colorimetric determination of vitamin A by the alkali digestion method

Raymond M. Fuoss, Charles A. Kraus

The quantum‐mechanical treatment previously applied to benzene, naphthalene, and the hydrocarbon free radicals is used in the calculation of extra resonance energy of conjugation in systems of double bonds, the dihydronaphthalenes and dihydroanthracenes,...

An absorption apparatus for the micro-determination of certain volatile substances: The determination of urea and ammonia in body fluids.

ANEMIA OF INFANCY FROM MATERNAL IRON DEFICIENCY IN PREGNANCY 123

S. Burt Wolbach, Percy R. Howe

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