INDEX 
Dendrite, 77; metabolic gradient 
in sensory, 78. 
Dextrose, 82. 
Diphasic current, 13. 
Dog, metabolism in. See Carbon 
dioxide production. 
Drugs, on refractory period, 48. 
Dry seed. See Seed. 
Dyer, Thistleton, 87. 
Efferent fiber, 58; gradient in, 
see Metabolic gradient. 
Eggs, production of acid in, 41. 
Ehrlich, 37. 
Electrical changes: as functional 
change, 4; discovery of, 4; 
as sign of passage of nerve im- 
pulse, 23; influence of carbon 
dioxide on, 13; See also Blaze 
current; Electrical sign of life. 
Electrical current, 37. 
Electrical resistance, changes in, 
after stimulation, ror. 
Electrical sign of life. See Blaze 
current; Electrical resistance. 
Electricity: measure of, 3; ve- 
locity of, 8. 
Electrodes, 12, 13, 40. 
Electromotive force, in nerve, 35. 
Electropositive, 58. 
Energy, source of, in living matter, 
9, II. 
Ether, 25, 61; for effect of, on 
carbon dioxide production, see 
Carbon dioxide production. 
Ethyl urethane, 25, 63. See also 
Carbon dioxide production. 
Excitability: degree of, 59; de- 
pression of, see Anesthetics; 
its relation to conductivity, 57, 
chap. iv; its relation to metab- 
olism, 59; three criteria of, 
59; transmission of, 41. Seealso 
Irritability. 
Faraday, 3. 
Fat, Io. 
139 
Fatigue: as metabolic sign, 49; 
lack of, in nerve, 8, 46. 
Fermentation, 10, 23, 25, 27. 
Film, of barium hydroxide, 15, 16. 
Fletcher, 30, 41. 
Forgetting, phenomenon of, 35. 
Frog. See Carbon dioxide pro- 
duction. 
Fréhlich, 45. 
Functional changes, 4; in the 
nerve impulse, 7; invisible, 4; 
See also Electrical changes; 
Chemical changes. 
Fundulus hectroclitus, 110. 
Galen, 11. 
Galvani, 5, 13. 
Galvanometer, 3, 5, 13, 23. 
Ganglion, 31; comparison with 
metabolism of nerve fiber, 31; 
heart ganglion, 32. See also 
Carbon dioxide production. 
Glass plate, 20, 37; diagram, 38. 
Gotch and Burch, 47. 
Gradient: metabolic, 79; in 
afferent fiber, 76; in efferent 
fiber, 72; in sensory dendrite, 
77; relation of, to direction of 
impulse, 78, 80; structural, 75. 
Green pigment, z. 
Growth, 10, 35. 
Guinea-pig. See Carbon dioxide 
production. 
Haberlandt, 54. 
Heart, 31. 
Heat coefficient, 52. 
Heat formation: in brain, 36; in 
nerve 7, 49; its relation to 
metabolism, 5. 
Helmholtz, 50. 
Herrick, 71. 
Hill, 30; on heat formation, so. 
Homarus vulgaris. See Carbon 
dioxide production. 
Hopkins, 41. 
