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An x‐ray study has been made of precipitation‐hardened, 7.16 percent tungsten, iron‐tungsten alloys. It is concluded that the precipitation reaction is of the discontinuous type. On the basis of diffraction evidence a mechanism for the formation and growth of the precipitate is proposed and...
The Young's modulus and specific energy loss of Lucite and Karolith were measured at different frequencies in the neighborhood of 50 kc∕sec. as a function of temperature. The temperature range for Lucite was from −55°C to 65°C, and for Karolith, 25°C to 110°C. It was found that the...
Dyadic algebra, because it has been designed for three‐dimensional systems, must undergo further development to be effective for more than three‐mesh networks. There is little point in carrying out such a development, since the much used cross product and the symbolism of dyadics both lose...
The selection of filament material from which another metal can be evaporated successfully depends largely upon the three properties of wetting ( W ), reaction or alloying ( R ), and evaporation ( E ). Nine filament materials and twenty‐seven evaporated metals have been investigated and the...
Starting with the fundamental field equations of Maxwell, the various approximations involved in the usual engineering formulation of the multiconductor problem are examined. Subject to these approximations, the set of differential equations which is taken as the starting point of the classical...
Starting with the fundamental field equations of Maxwell, the equations governing the propagation of electromagnetic waves along two parallel wires are derived. The treatment is greatly facilitated by the use of the Laplacian transformation or modern rigorous operational calculus. First the case...
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