1 See Darwin: Expression of Emotions in Man and Animals, New York, 1905, pp. 101, 117.

2 Spencer: Principles of Psychology, London, 1855.

3 McDougall: Introduction to Social Psychology, London, 1908, pp. 49, 59.

4 Crile: Boston Medical and Surgical Journal, 1910, clxiii, p. 893.

5 Macleod: Diabetes, etc., p. 80.

6 Darwin: Loc. cit., p. 72.

7 Nasse: Archiv für die gesammte Physiologie, 1869, ii, p. 106; 1877, xiv, p. 483.

8 Frentzel: Archiv für die gesammte Physiologie, 1894, lvi, p. 280.

9 Zuntz: Oppenheimer’s Handbuch der Biochemie, Jena, 1911, iv (first half), p. 841.

10 Benedict and Cathcart: Muscular Work, a Metabolic Study, Washington, 1913, pp. 85–87.

11 Chauveau and Kaufmann: Comptes Rendus, Académie des Sciences, 1886, ciii, p. 1062.

12 Comptes Rendus, Société de Biologie, 1886, xxxviii, p. 410.

13 Morat and Dufourt: Archives de Physiologie, 1892, xxiv, p. 327.

14 Pavy: The Physiology of the Carbohydrates, London, 1894, p. 166.

15 Magnus-Levy: v. Noorden’s Handbuch der Pathologie des Stoffwechsels, 1906, i, p. 385.

16 Locke and Rosenheim: Journal of Physiology, 1907, xxxvi, p. 211.

17 Patterson and Starling: Journal of Physiology, 1913, xlvii, p. 143.

18 See Macleod and Pearce: American Journal of Physiology, 1913, xxxii, p. 192. Pavy and Siau: Journal of Physiology, 1903, xxix, p. 375. Macleod: American Journal of Physiology, 1909, xxiii, p. 278.

19 Locke: Centralblatt für Physiologie, 1900, xiv, p. 671.

20 Schumberg: Archiv für Physiologie, 1896, p. 537.

21 Frentzel: Archiv für Physiologie, 1899, Supplement Band, p. 145.

22 Lee and Harrold: American Journal of Physiology, 1900, iv, p. ix.

23 Wilenko: Biochemische Zeitschrift, 1912, xlii, p. 58.

24 Wilenko: Archiv für experimentelle Pathologie und Pharmakologie, 1913, lxxi, p. 266.

25 Lusk: Proceedings of the Society for Experimental Biology and Medicine, 1914, xi, p. 49. Also Lusk and Riche: Archives of Internal Medicine, 1914, xiii, p. 68.

26 See Elliott: Journal of Physiology, 1912, xliv, p. 376.

27 Macleod: Diabetes, etc., pp. 64–73.

28 Macleod: Diabetes, etc., pp. 68–72.

29 See Biedl: Die Innere Sekretion, 1913, i, p. 464.

30 Hoskins and Lovellette: Journal of the American Medical Association, 1914, lxiii, p. 317.

31 See Haldane and Priestley: Journal of Physiology, 1905, xxxii, p. 255.

32 Douglas and Haldane: Journal of Physiology, 1909, xxxix, p. 1.

33 See Januschke and Pollak: Archiv für experimentelle Pathologie und Pharmakologie, 1911, lxvi, p. 205. Trendelenburg: Zentralblatt für Physiologie, 1912, xxvi, p. 1. Jackson: Journal of Pharmacology and Experimental Therapeutics, 1912, iv, p. 59.

34 Cf. Hoskins and McClure: Archives of Internal Medicine, 1912, x, p. 355.

35 Cannon and Hoskins: American Journal of Physiology, 1911, xxix, p. 275.

36 Borberg: Skandinavisches Archiv für Physiologie, 1913, xxviii, p. 125.

37 Starkenstein: Zeitschrift für experimentelle Pathologie und Therapie, 1911, x, p. 95.

38 Czubalski: Zentralblatt für Physiologie, 1913, xxvii, p. 580.

39 For evidence and for references to this literature, see Bang: Der Blutzucker, Wiesbaden, 1913, pp. 104–108.

40 Starkenstein: Loc. cit., p. 94.

41 Macleod: Diabetes, etc., p. 184.

42 Zuntz: Loc. cit., p. 854.