138 
30; frogs, Rana esculenta, and 
temporaria, 30; in ganglion, 
Limulus polyphemus, 32; in 
muscle, frog, Rana temporaria, 
30; lobster, Homarus vulgaris, 
30; man at rest, 30; in differ- 
ent parts of nerve, 76, 77; in 
hydrogen, 26, 43; in ‘“‘inexci- 
table” nerves, 65; in killed 
nerves, 24; in nerves: carp, 
R. lat. vag., and R. lat. acc., 79; 
catfish, R. lat. vag., and R. Jat. 
acc., 79; chloral hydrate, 65; 
dog, anterior root, posterior 
root, hypoglossal, 79; frog, 
Rana pipiens, sciatic, vesting, 
and stimulated, 32; guinea 
pig, 22; hypoglossal, 79; ‘‘in- 
excitable,” 62; Limulus, claw 
nerve, 32; mouse, 22; optic 
nerve (whole) proximal and dis- 
tal, 32; rabbit, 22; rat, 22; 
6 skate, Raia erinecia, and 
Raia ocallata, optical, olfactory, 
oculomotor, 22; spider crab, 
Libinia canaliculata, claw nerve, 
whole, proximal, distal, 32; 
squiteague, cynoscion  regalis, 
22; stimulated, non-stimulated, 
under treatment of different 
concentrations of ethyl ure- 
thane, 62; turtle, 22; under 
anesthesia, 255 in resting nerves, 
19, 22, 32; in stimulated nerves, 
at successive time intervals, 65; 
* 
under anesthesia, 25, 61. 
Carbon dioxide: as a measure of 
metabolism, 12; as end product 
of metabolism, 11, 34; gradient, 
79; increment of, on stimula- 
tion as sign of life, 87, chap. v; 
influence on electrical change, 
14; method of analysis of, see 
Biometer; method of detecting, 
in nerve, 16, 20; sources of, 
23. 
Carbon dioxide free air, 116. 
Carbonate, 23. 
Carp. See Carbon dioxide pro- 
duction. 
A CHEMICAL SIGN OF LIFE 
Cat fish. See Carbon dioxide 
production. 
Chemical energy, 84. 
Chemical processes, various, in 
the living matter, ro. 
Chemical sign of life, algae, 93; i 
Australian pine, 92; in comunon 
glass, 92; in corn, 91; in 
Japanese ivy, 92; in Lincoln oats, 
91; in mustard seeds, 91; in 
nerve, 34, 55; in rice, 91; 
in Swedish selected oats, 91; i 
wheat, 89. 
Chemical stimulation. See Stim- 
ulation. 
Chemical transformation, 12. 
Child, 74, 81. 
Chloral hydrate, 61. See also 
Carbon dioxide production. 
Chloroform, 61. 
Chlorophyll, 2. 
Claude Barnard, 48. 
Claw nerve. See Nerve. 
Cold-blooded animals, 22. 
Conducting medium, 18. 
Conduction: as phenomenon of 
living matter 4; also chap. iv. 
Conductivity, 6. See also Con- 
duction. 
Connective tissue, 16, 18, 46. 
Contractility, 8 
Crab. See Cancer pagurus. 
Crayfish. See Astacus. 
Crocker, 92. 
Crustacea. See Carbon dioxide 
production. 
Current of action. See Action 
current. 
Cyanide. See Potassium cyanide. 
Cynosion regalis. See Carbon di- 
oxide production. 
Daniel cell, 52. 
Death, rapidity of, 73. 
