INDEX | 
kinds of, 58; electrical changes 
in, 5, 12, 13; function of, 6; 
functional changes in, 7; heat 
formation in, 7, 50; lack of 
visible sign of vitality in, 7; 
longevity of isolated, 24; meta- 
bolic gradient in, 72; metabol- 
ism on stimulation, 55; oxygen 
consumption by, 53; physical 
changes in, 7; production of 
acid in, 25; property of, 6; 
resting metabolism in, 22; 
structural changes, 7;  struc- 
tural gradient in, 75; use of 
isolated, 23. 
Nerve impulse, 6; direction of, 
72; direction of, and metab- 
olic gradient, 77; effect of 
salt on, 82; effect of tempera- 
ture on, 83; nature of, 85; 
nature of material basis of, 107; 
velocity of, 8; velocity of, and 
resting metabolism, 80. 
Nitrogen, electrical response in, 
45. 
Non-medullated nerve, 18. 
Nucleus, cell, on oxidation, 16. 
Oculomotor nerve. See Nerve. 
Olfactory nerve. See Nerve. 
Optic nerve. See Nerve. 
Organic compounds, 22. 
Osterhout, 92. 
Oxidation: measure of, see Metab- 
olism; rdéle of nucleus on, 16. 
Oxygen: as essential to life, 11; 
atmospheric, 15; consumption 
by brain, 36; consumption by 
linseed oil, 35; consumption by 
nerve fibers, 53; consumption 
by stimulated nerve, 50, 533 
consumption under anesthesia, 
60; deficiency of, on nerve me- 
tabolism, 27; discovery of, II; 
role of, on excitability, 54, 60; 
role of, in salt stimulation, 26. 
Painting, chemical process in, 34. 
Peas, 31. 
I4] 
Permeability, 81, 103. 
Plants: differentiation from ani- 
mals, 2; electrical response in, 
5; resemblance to animals, 2; 
response in, 2. See also Seed. 
Pneumatic spirit, 11. 
Positive phase, 13. 
Positive response, influence of 
carbon dioxide on, 14. 
Potassium chloride, 42. 
Potassium cyanide, 75. 
Priestly, 11. : 
Propagation, of excitability. See 
Nerve impulse. 
Proteins, Io. 
Protoplasm, 48; _ physical condi- 
tion in, 8 
Protoplasmic respiration, 35. 
Psychic change, 3. 
Psychic life, evolution of, 2; in 
child, 2; in seed, 3; physical 
basis of, 3. 
Psychic process, physical process, 
accompanying, 4 
ie aca 3; indirect measure of, 
Psychometer, 3. 
Rabbit. See Carbon dioxide pro- 
duction. 
Raia erinecia. See Carbon diox- 
ide production. 
Raia ocallata. See Carbon dioxide 
production. 
Ramus lateralis accessorius. See 
Nerve. 
Ramus lateralis vagis. See Nerve. 
Rana esculenta. See Carbon di- 
oxide production. 
Rana pipiens. See Carbon dioxide 
production. 
Rana temporaria. See Carbon 
dioxide production. 
Rat. See Carbon dioxide pro- 
duction. 
