Page:Scientific Papers of Josiah Willard Gibbs.djvu/414

 due to the neutral gas. This result, which may be extended to any number of neutral gases, is simply an expression of Dalton's Law.

We now proceed to the comparison of the formulæ, especially of equation (6), with the results of experiment.

Peroxide of nitrogen.—If we take the constants of the equation for this substances from the paper already cited, we have $$t_{\text{C}}$$ denoting the temperature on the centigrade scale. The numbers 3.178 and 1.589 represent the theoretical densities of N2O4 and NO2