1. Proc. Amer. Physiol. Soc. Abstract of paper read before Section B. A. A. A. S., New Orleans, 1931.
2. Szegvari andSchalek, Kol.-Zt.,32, 318, 1923.
3. Péterfi, Arch. f. Entwicklungsmechanik d. Organism.,112, 660, 1927.
4. Unfortunately this paper, in its final form, has never been published.
5. Karrer andBerl, Zt. Zhys. Ch.,152, 150, 1931.