The advanced theory of statistics

The composition of the stream system of a drainage basin can be expressed quantitatively in terms of stream order, drainage density, bifurcation ratio, and stream-length ratio.Stream orders are so chosen that the fingertip or unbranched tributaries are...

The ideas of the first and second papers in this series, which make it possible to interpret entropy data in terms of a physical picture, are applied to binary solutions, and equations are derived relating energy and volume changes when a solution is...

Gerhard Schmidt, S. J. Thannhauser

Distribution functions,F n(z, {n}), for multicomponent systems are defined proportional to the probability density that n molecules in an infinite isothermal system of fugacity set z will occupy the configurational coordinates symbolized by {n}. All thermodynamic...

Homer W. Smith, Norma Finkelstein, Lucy Aliminosa, Betty Crawford, Martha Graber

"We must, therefore, be prepared to find that further advance into this region will require a still more extensive renunciation of features which we are accustomed to demand of the space time mode of description." — Niels Bohr.

The earliest method of estimation of statistical parameters is the method of least squares due to Markoff. A set of observations whose expectations are linear functions of a number of unknown parameters being given, the problem which Markoff posed for...

The principle of corresponding states in modern form has been applied to the following properties: the critical state, the virial coefficient, the Boyle point, the densities of coexistent phases, the vapor pressure of the liquid, the entropies of evaporation...

Stanley E. Bradley, Franz J. Ingelfinger, G. P. Bradley, John J. Curry

The problem is considered of the convection of a fluid through a permeable medium as the result of a vertical temperature‐gradient, the medium being in the shape of a flat layer bounded above and below by perfectly conducting media. It appears that...

Seymour S. Kety, Carl F. Schmidt

Two examples of a previously unrecognized condition which may be confused with congenital heart disease are cited in this report. The condition may occur anywhere in rural areas where well water is used in infant feeding.REPORT OF CASES Case 1.— C....

A new instrument is described which will sample windborne and stationary aerosols such as natural fogs and clouds, fine sprays, insecticidal mists, coarse dusts, pollen and spores, etc. By means of four progressively finer jets impinging on glass slides...

Francis F. Rosenbaum, Frank N. Wilson, Franklin D. Johnston

Volume 25, 1945. Paper by J. W. Bean: Effects of Oxygen at Increased Pressure. Page 69, 2nd paragraph, line 14, which reads “...137.5 + (3 x 360) + 1226.5 ...” should read “... 137.5 + (3 x 360) + 9 = 1226.5 ...”

A group of parallel threads of equal length, clamped at each end so that all threads extend equally under tension, is called a bundle, and the maximum load which the bundle can support is called its strength. The object of the work is to study the probability...

Charles Huggins, William Wallace Scott

André Cournand, E. DeF. Baldwin, Dickinson W. Richards, M. S. Lester, M. Jones

It is not necessary or desirable to treat every case of malocclusion that is presented. Many, if not most, of these children of 3 to 6 years can be safely put under observation in order that the tendency of growth can be noted. A fair percentage will...

For calculation of terminal velocities it is convenient to express the Reynolds' number, Re, of a moving sphere as a function of the dimensionless group ψRe2, where ψ is the drag coefficient. The following equations have been fitted by the method of...

Eugene A. Stead, James V. Warren, Arthur J. Merrill, E. S. Brannon

The historical development of NACA airfoils is briefly reviewed. New data are presented that permit the rapid calculation of the approximate pressure distributions for the older NACA four-digit and five-digit airfoils by the same methods used for the...

A new antibiotic "bacitracin" has been recovered from a strain of the B. subtilis group of organisms. It is neutral, water-soluble, non-toxic and relatively heat stable. In vitro it is active chiefly against Grampositive organisms, but the gonococcus...

D. D. Proemmel, Ruth E. Frank

The rate of the heart varies widely in normal persons and may be increased temporarily by many different causes. Among them are excitement, exertion, pain, the ingestion of food, the drinking of coffee or tea and the smoking of tobacco. Acceleration is...

E. S. Brannon, Arthur J. Merrill, James V. Warren, Eugene A. Stead

H. J. Eysenck, W. D. Furneaux

The specific relationship of age to the seizures of epilepsy has been inadequately set forth. Seizures of course may begin at any age between birth and senility, but the incidence of various types of seizures and of various patterns of electroencephalographic...

STREPTOCOCCAL FIBRINOLYSIS: A PROTEOLYTIC REACTION DUE TO A SERUM ENZYME ACTIVATED BY STREPTOCOCCAL FIBRINOLYSIN

The fundamental connexion between thermoluminescence, phosphorescence and electron traps in solids has been investigated. Thermoluminescence and long-period phosphorescence arise from the release of electrons from metastable levels or traps. By studying...

Ravich A, Arthur Purdy Stout, Robert A. Ravich

Actual substances exhibit a very complicated behavior under mechanical stresses which cannot be described by classical elasticity theory nor by the classical theory of the hydrodynamics of viscous fluids. A general molecular theory describing the behavior...

In each of five dogs a screw of vitallium was placed in the anterior border of the ramus of the mandible, one side on each dog. Traction was applied to the screw by means of an orthodontic elastic connected to a maxillary appliance. All of the screws...

A PROTEOLYTIC ENZYME OF SERUM: CHARACTERIZATION, ACTIVATION, AND REACTION WITH INHIBITORS

A system of five, equally‐spaced, square coils which provides a uniform magnetic field over a considerable volume is described. The region of uniformity is easily accessible from outside the coils. The method used to design the system is discussed.

J. M. Ramsbottom, E. J. Strandine, C. H. Koonz

Fibrils from certain molluscan muscles, in particular the adductor muscles of the clam Venus mercenaria, were examined with the electron microscope and found to possess periodic variations in structure. In order to make these structural variations visible,...

C. B. Shaffer, C. P. Carpenter, Henry F. Smyth

C. H. Wadleigh, A. D. Ayers

Louis Pillemer, M. C. Hutchinson

Structure Theory for Algebraic Algebras of Bounded Degree

Whereas extensive efforts have been directed recently toward improving the mathematical exactness of the statistical mechanical theory of polymer solutions, fundamental limitations set by the nature of the physical approximations have not received adequate...

Albert Einstein, E. G. Straus

Harold R. Curran, Fred R. Evans

T. N. Harris, Elizabeth Grimm, E. Mertens, William E. Ehrich

Clarence S. Ross, Sterling B. Hendricks

Either 50 mg 1(-)tryptophane or 1.**0** mg nicotinic acid per 100 gms of ration completely counteracts the growth retardation caused by the inclusion of 40 per cent. corn grits in a low protein ration. A possible explanation of this observation...

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The quasi‐chemical method in the investigation of the equilibrium distribution of atoms in the pairs of neighboring sites in a superlattice is generalized by considering groups containing large numbers of sites. The generalized method may be used to...

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