Abstract
The average pressure coefficients to 12000 kg/${\mathrm{cm}}^{2}$ of electrical resistance for three series of alloys: lithium-tin, bismuth-tin, and calcium-lead, and for one calcium-magnesium alloy of 10 A% magnesium are given in tabular form. The variation with concentration of the pressure coefficient, the temperature coefficient, and the relative change of the temperature coefficient with pressure for these three series is comparable with the variation of the structure of the alloys as given by the equilibrium diagram. The conductivity and the pressure coefficient of a dilute solid solution of bismuth in tin are the same as those of pure tin under pressure. As hydrostatic pressure and impurities have the same effect on the pressure coefficient, electric conduction probably depends on geometrical properties of the conductor.
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