Abstract
The equation logη=A+B/(T+C) is obtained as a simple modification of Andrade's viscosity equation by treating the activation energy as a function of temperature, A, B, and C being free parameters. This is shown statistically to express adequately the temperature dependence of viscosity over substantial ranges of temperature for all the liquids examined, viz., n-heptane; n-nonane; n-undecane; n-tridecane; n-heptadecane; benzene; viscous mineral oil; ethanol; 1,2-dibromopropane; water; mercury; molten gallium; potassium; sodium; sodium nitrate; silver bromide; lead chloride; bromine; 98–100 percent sulfuric acid.
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