INDEX 



Retina, 188 

 Reverberation, 137 

 Riguet, J., 158, 273 

 Rods, 160 

 Rubber, 112 



Sampling, repeated, 172 



School, 139 



Science, 107, 121, 131 



Scout, 155 



Searching, 236, 258 



Secrecy system, 141, 243, 273 



See-saw, 82 



Selection, 235, 236 



— , natural, 196 



— , quantity of, 255 



— by machine, 259 

 Self-locking, 69, 234 

 Self-observation, 55 

 Self-reproduction, 111, 196 

 Semaphore, 125 

 Sensory channel, 220 

 Sequence, 155, 172 

 Series, exponential, 173 

 Set, 122 



— and machine, 135 

 Shannon, C. E., vi, 93, 123, 161, 



243, 245, 260, 273 

 Shell, 198 

 Shivering, 238 

 Shuffling, 259 

 Signal, 183, 221 

 Silver chloride, 68 

 Simple proportions, 131 

 Simplification, 103 

 Singing, 60 

 Single-valued, 14 



— system, 39 

 Siphon, 238 

 Size of system, 61 



— of inverter, 151 

 Skid, 203 



Skull, 201 

 Smoke, 183 



Sommerhoff,G., 211,273 

 Sophistication, 92 

 Speech, 127 

 Speedometer, 146 

 Square of transformation, 17 

 Stability, 23, 73, 113 



— under displacement, 77 



— and survival, 197 



— in Markovian machine, 228 

 Stable region, 76, 229 

 Stages of regulation, 263 



— of amplification, 265 

 Stamp, 256 

 Standard, 246 



Star cluster, 1 1 3 



State, 25 



— , stationary, 30 



— of equilibrium, 74, 229 

 — , inaccessible, 92 



— , initial, as noise, 217 

 — , absorbing, 229 

 Stationary, 30 

 Statistical mechanics, 62 

 Statistics, 245 

 — , determinacy in, 91 

 Steady state, 30, 169 

 Steering, 203, 211,215 

 Steermanship, 1 

 Step-function, 242 

 Stepping switch, 84 

 Stickleback, 26 

 Stochastic, 162 

 Stock breeder, 62 

 Strategy, 205, 240 

 207, Sub-system, 48 

 Sugar, 111 

 Supernova, 248 

 Supplementation, 65, 162 



— of selection, 258 

 Survival, 77, 197 

 Switch, as input, 43, 253 

 System, 40 



— , complex, 4 



— , economic, 37 



— , absolute, 41 



— , definition of, 106, 227 



— , very large : see Very 



Tabetic, 220 



Tachometer, 146 



Tap, 234 



Tea-taster, 135 



Telegraph, 161, 211 



Telephone, 161 



Temperature, 135, 198, 237, 238 



Test lido, 198 



Thermal agitation, 78, 186 



Thermodynamics, 136 



Thermostat, 135, 198,200 



Thing, 131 



294 



