1. Among these may be mentioned Physical Review, 1912, 34: 235; Proc. American Academy Arts and Sciences 55: 137; 1920; American Journal of Hygiene January Supplement; 1923; Elements of Physical Biology, Baltimore, 1925. This last contains references to the author’s other publications relative to this subject.
2. Memorie della R. Acad. Nazion. dei Lincei 1926 ser 6, vol. 2, part 3, page 5
3. Lecons sur la theorie mathêmatique de la lutte-pour la vie, Paris, Gauthiers-Villars, 1931, page 9.
4. See, for example, Lotka, A. J., Elements of Physical Biology, 1925, page64.
5. This special case, as Volterra has shovn, can be integrated in finite terms. It is, however, of minor interest, since such an exact relation between the coefficients p1 and p2 represents, in concrete cases, an infinitely improbable condition.