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The forces acting on a superconducting body in a magnetic field may be obtained by analogy with hydro‐dynamics, considering the similarity of the force field around a perfect diamagnetic with the flow field of an ideal liquid past an impermeable body of the same shape. The translation is...
The transfer of monolayers of proteins to solid surfaces from a liquid substrate is now a well‐established procedure. It has been found that if particulate matter is present in the protein solution from which the monolayer is to be formed, the surface streaming set up by the spreading of the...
The velocity and attenuation of ultrasonic waves are measured as a function of temperature in specimens of a Buna‐N vulcanizate swollen to various degrees with methyl ethyl ketone. The frequencies are 2, 5, and 10 megacycles. The experimental method consists of determining the insertion loss...
It is shown that, for vortex trails in a nonviscous fluid, the mean longitudinal spacing a and mean transverse spacing h are invariant. It follows from this and other known facts, that the periodicity of a vortex trail is unstable, not the ratio h∕a . In a viscous fluid, a is invariant but h...
A study has been made of thermionic emission from tungsten filaments cataphoretically coated with alkaline earth oxides. It was found that the emission from the oxide‐coated filament was not influenced by the variation of work‐function with crystallographic direction of the base metal. A...
Expressions for the electric field due to an oscillating horizontal dipole placed in a semi‐infinite dissipative medium have been derived for the case when the frequency is low. The main work involves the evaluation of some complex integrals which have been reduced to forms suitable for...
This paper describes the use of an electromechanical analog to examine the limiting values of various parameters needed to destroy a predominantly subharmonic oscillation of order one‐third, existing in a nonlinear system. The results of the analog are then compared with the limiting values...
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