Recent Papers

FREQUENCY RANGE REQUIRED FOR GOOD TRANSMISSION OF SPEECH AND MUSIC\*

CHEMICAL COMPOSITION OF THE ATMOSPHERE AT AN ALTITUDE OF 70 KM

Electrical engineering occupies a special place, an exceptionally honorable one for our great Motherland, among those numerous branches of science and technology in which Russian a

Book Review: M. A. Shatelen. Russian Electrical Engineers of the Second Half of the Nineteenth Century.

OBSERVATIONS OF COSMIC RADIATION USING PHOTOGRAPHIC PLATES SENSITIVE TO ELECTRONS

Owing to the great advances in nuclear physics achieved in recent years, the method of labeled atoms is becoming accessible to an ever larger number of laboratories. There is no do

Book review: M. Kamen. Radioactive Tracers in Biology.

NEW DATA ON He³

DECAY AND NUCLEAR INTERACTIONS OF STOPPED CHARGED MESONS

Neutrons in Auger showers

INVESTIGATION OF THE ABSORPTION OF HIGH-ENERGY GAMMA QUANTA

NEWS OF SPECTROPHOTOMETRY

PHOTOGRAPHIC PLATES FOR NUCLEAR PHYSICS

ELASTIC SCATTERING OF NEUTRONS BY ATOMIC NUCLEI

MOVABLE VACUUM FEEDTHROUGHS\*)

ULTRASONIC MICROSCOPE

Patterns of Alpha Decay

EQUIPMENT AND TECHNIQUES OF INFRARED SPECTROMETRY\*)

ENERGY DISTRIBUTION OF FISSION FRAGMENTS OF URANIUM-235 AND URANIUM-233

TRANSPARENT METAL AND NEW POSSIBILITIES FOR OPTICAL STRESS ANALYSIS

ELECTRONICS IN NUCLEAR PHYSICS*)

The main attention is devoted to the theory and calculation of circuits intended for the amplification and recording of pulses from an ionization chamber or a proportional counter collecting electrons. It is precisely in this area that a number of significant advances achieved in recent years by ins…

INTERPRETATION OF PHENOMENA OCCURRING IN COSMIC RAYS

This article describes the main experiments on the study of cosmic rays and attempts to arrange their results in a logical sequence. The article does not consider all phenomena in cosmic rays. For example, issues related to atmospheric showers are not addressed, and geomagnetic phenomena are discuss…

PRECISION METHOD FOR MEASURING THE ENERGY OF $\gamma$-RAYS

P. Görlich. Photocells, Their Manufacture and Properties. Translated from the manuscript by P. P. Feofilov, edited by Prof. V. P. Zhuze. Gostekhizdat, Moscow–Leningrad, 1948, 256 p

Book review: P. Görlich. Photocells, Their Manufacture and Properties.

Emission Electron Microscope

The present article aims to briefly describe the principal configurations of the emission electron microscope with electrostatic and magnetic lenses and to provide a review of studies carried out with its aid mainly after 1937.

Microradiography Using Secondary Electrons*)

EXPERIMENTAL PROOF OF THE EXISTENCE OF EXCHANGE NUCLEAR FORCES

LATENT PHOTOGRAPHIC IMAGE

M. I. Korsunsky.** *Atomic Nucleus.* Gostekhizdat, Moscow—Leningrad, 1949, 308 pp., price 6 rubles.

Book Review: M. I. Korsunsky. The Atomic Nucleus.

The Laboratory of Electromagnetism at the Faculty of Physics of Moscow State University

ON THE TRANSITION IN STRUCTURAL AND SPECTROSCOPIC STUDIES FROM kX UNITS TO Å UNITS

ON THE QUESTION OF ENERGY MIGRATION IN BIOLOGICAL PROCESSES

INVESTIGATION OF THE CRYSTAL STRUCTURE OF ICE USING NEUTRON DIFFRACTION

MODERN THEORY OF MAGNETISM\*

Physics Course, edited by Academician N. D. Papaleksi, Vol. I. Mechanics. Acoustics. Heat and Molecular Physics. State Publishing House of Technical and Theoretical Literature, 194

ON THE DROPLET METHOD FOR DETERMINING THE ELECTRON CHARGE

$K$-Spectrum of Element No. 61

) *Electricity*, 1945, No. 8.

ON THE SEVENTY-FIFTH ANNIVERSARY OF THE DEATH OF B. S. JACOBI (1874–1949)

Ukrainian Conference of Food Sanitation Physicians and Laboratory Workers

Louis de Broglie. Electromagnetic Waves in Waveguides and Hollow Resonators. State Publishing House of Foreign Literature, Moscow, 1948, 105 pp., price 8 rubles 20 kopecks.

Book review: Louis de Broglie. Electromagnetic Waves in Waveguides and Hollow Resonators.

Structure of Metals

Book review: C. S. Barrett. Structure of Metals.

) Cf. L. Landau and E. Lifshitz, *Quantum Mechanics*, Part I, Gostekhizdat, 1948.

He³ Isotope

NEW DATA ON TWILIGHT LUMINESCENCE OF ATMOSPHERIC SODIUM

PHOTOSENSITIVE GLASS

PHYSICISTS—LAUREATES OF THE STALIN PRIZE

Diffraction of single electrons flying one after another

ON THE DISTRIBUTION OF NUCLEAR DISINTEGRATIONS NEAR LARGE SHOWERS OF HEAVY PARTICLES

80 MeV Synchrotron

Combined Optical Filters for the Ultraviolet

Expanded Meeting of the Acoustics Commission of the USSR Academy of Sciences

From February 26 to March 1, 1949, an expanded meeting of acousticians was held in Moscow, convened by the Acoustics Commission under the Division of Physical and Mathematical Sciences of the Academy of Sciences of the USSR. The purpose of the meeting was to illuminate the paths of development of So…