Recent Papers

O. Dorno. Physik der Sonnen- und Himmelstrahlung (Die Wissenschaft. Einzeldarstellungen aus der Naturwissenschaft und der Technik, herausgegeben von Prof. Dr. Eilhard Wiedemann. Bd

A. Sommerfeld. Atombau und Spektrallinien

New Data on the Artificial Transmutation of Elements.

Distribution of Energy in Spectral Series

Riecke Lehrbuch der Physik

P. Lenard On the Principle of Relativity, Ether, Gravitation

Origin of Actinium.

A New Definition of the Charge of an Atomic Nucleus

Outline of the History of the Establishment of the Fundamental Principles of Mechanics

Introductory lecture to the course in theoretical mechanics taught at the Maritime Academy.

The book can be recommended only for a preliminary, superficial acquaintance with the subject.

Ultra-micrometer.

Absorption of the Force of Gravity

Temperature coefficient of chlorophyll decomposition in the light

Anniversaries. In 1920: the 70th anniversary of E. Goldstein; 25 years since the discovery of X-rays; 100 years since Oersted’s discovery of the action of an electric current on a

Direct Measurement of Thermal Molecular Velocities

An Attempt to Interpret the Result of Michelson’s Experiment.

Numerical value of the universal constant of Planck, $h$.

The brochure is intended for a reader already familiar with the foundations of the theory of relativity.

Radioactivity and Physiology

N. Zwaardemaker. On physiological radioactivity.

Corrections

Advances in X-Ray Spectrometry

Ratio of Mass to Weight for Crystals and Radioactive Substances.

Electric Dipoles in Liquid Dielectrics.

Measurements of the Strength of Radio Reception, Atmospheric Ionization, and Other Meteorological Elements During the Solar Eclipse of April 8, 1921

The booklet is written throughout with great ease and is read with much interest.

New Theory of Optical Series

Study of the Visible Grayish-Blue Radiation of the Focal Spot of a Lilienfeld Tube

The appearance of the edition is striking in its elegance and portability.

Curt Schmidt. The Periodic System of the Chemical Elements

On the Work of Ionization and Dissociation of Hydrogen.

Absorption Cross Section of Molecules with Respect to Slow Electrons

Determination of the Size and Internal Structure of Colloidal Particles Using X-rays.

Materials on the Study of the Kursk Magnetic Anomaly, published under the editorship of Acad. P. P. Lazarev:

On the Application of the Second Law of Thermodynamics to the Living Organism

Curt Wachtel. On the Applicability of the Second Law of Thermodynamics to Processes in the Animal Organism.

I. A. Smorodintsev. Enzymes of the Plant and Animal Kingdoms

The Revival of Prout's Hypothesis

Measurement of the Mean Free Path of a Neutral Atom.

Molecular Forces and Valence in Physicochemical and Biological Processes

The Nuclear Structure of the Atom

V. Trofimov. Application of Aerology to Ballistics

H. A. Lorentz. The theory of electrons

Simple Tones and Their Basic Properties

Fluorescence of Mercury Vapor.

On Some Applications of Amplifiers Used in Wireless Telegraphy

On the ionization potential of He

Die theoretischen und experimentallen Grundlagen des neuen Wärmesatzes

On the Natural Oscillations of Atoms in Bohr’s Model in the Infrared Part of the Spectrum in Connection with Specific Heat at High Temperatures

On the Propagation of Sound in Water

Application of the Quantum Theory to the Theory of Spectral Series

Die Grundlagen der Quantentheorie