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X‐ray diffraction methods were used to investigate time changes which occur in the composition of oxide cathode coatings, initially equal molar (BaSr)O. Changes which occur in the composition of the bulk of the coating were detected by means of lattice constant measurements. A new method of...
In this paper a perturbation method is developed for treating non‐standard propagation of microwaves beyond the horizon in the case when the deviation of the M ‐curve from the standard (≡ the M ‐anomaly) can be represented by a term αe −λz , where z denotes height in natural units....
A method of evaluating mechanical hysteresis, elastic modulus, elongation, and growth rate of a yarn or cord subjected to cyclic loads in a fatigue test is described. The test is applied to seven typical tire cords‐one Nylon, two rayon, and four cotton cords including both high stretch and low...
This paper presents measurements of the forces required to drive a punch into plates of several grades of steel as a function of the distance of penetration, the entire punching operation being conducted in a fluid medium subjected to hydrostatic pressures up to 30,000 kg∕cm 2 . Qualitatively,...
A new method was developed for preparing natural and synthetic rubber specimens for examination with an electron microscope. The technique consisted of mixing latex with a water solution of polyvinyl alcohol and forming a film from the mixture. Electron micrographs of such specimens showed none...
It was shown previously that, when a cylinder of glass is sealed to the outside of a metal rod, the principal stresses in the glass are of opposite sign, so that tensile stresses cannot be avoided except by a perfect match. In this article the stresses are calculated for a solid glass cylinder...
X‐ray diffraction patterns are presented as evidence for the existence of a crystalline ``interface'' compound between the base metal and the coating of the oxide coated cathode. Measurements of the coating resistance to microsecond pulse currents, made with imbedded probes, indicate the...
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