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A study of the behavior of sulphur, selenium, tellurium, chromium, molybdenum, tungsten and uranium as cathodes in an arc in hydrogen reveals that all of them permit radio-frequency oscillations to occur in a tuned circuit across the arc. No magnetic field is required for these oscillations. The...
An analogue for a uniformly ionized gas on the basis of the known formula K p = 1 - ω 0 2 ω 2 for its specific inductive capacity is found in a shunt-tuned circuit. In that formula ω 0 2 = 4 π N e 2 m and ω is the impressed angular frequency. This formula is extended to two simple cases of...
The general expression for the van der Waals energy arising from dipole interaction between atoms involves a summation over transition probabilities. These are in most cases difficult to calculate. It is here pointed out that since these transition probabilities obey the sum rule of Thomas and...
Making use of a spectrometer with a salt prism and echelette gratings, and a Moll thermal relay, the authors have reexamined with increased resolution the four absorption bands of water vapor whose centers lie near 1.87μ, 2.66μ, 3.15μ and 6.26μ. The new study has greatly increased the number...
In this paper a simple tensor form of Dirac's equation is obtained. This is accomplished by considering ψ s and γ α ( rs ) of the usual equations as being related to a set of n -beins as invariants corresponding to true tensors ψ μ and Γ α β σ . The results are, however, independant of...
The temperature and pressure variation of the dielectric constant of formic and propionic acid vapors has been studied experimentally. The behavior is similar to that previously found for acetic acid. For formic acid it is possible to calculate from Coolidge's vapor density measurements the...
It is well known that the solutions of the wave-equation for hydrogen-like atoms may be represented graphically by interpreting Ψ Ψ * as a probability density . The probability density factors Φ m Φ m * · Θ m , l 2 · R n , l 2 = Ψ Ψ * are represented graphically and briefly discussed and...
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