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2. 2) Cushny, Journ. of Physiol. Vol. 37, p. 130 (1908).
3. 3) Cannon and Lyman, Amer. Journ. of Physiol. Vol. 31, p. 376 (1912-13).
4. 4) Hartman, Amer. Journ, of Physiol. Vol. 38, P. 438 (1915) Hartman and Kilborn, Amer. Journ. of Physiol. Vol. 45, P. 111 (1918); Hartman and Lang, Journ. of Pharm. and exp. Therap. Vol. 13, p. 417 (1919).
5. 5) Dale, Journ. of Physiol. Vol. 34, p. 163 (1905).