Mathematical contributions to the theory of evolution.—X. Supplement to a memoir on skew variation

In the second memoir of this series a system of curves suitable for describing skew distributions of frequency was deduced from the solutions of the differential equation 1/y dy/dx = b0 + b1x/a0 + a1x + a2x2. . . . .(I). These solutions were found to cover satisfactorily a very wide range of frequency distributions of all degrees of skewness.