INDEX. 
Sacculina, 278-280, 303. 
Sachs on energides, 148, 
Saint-Hilaire on derivation of spe- 
cies, 8. 
Salic law, 324. 
Salisbury on belief, 334. 
on knowledge, 336. 
Saltatory evolution, 69, 
Salvation Army, 274. 
Sanction, mystic, 366, 
Sanity, 340. 
of life, 276. 
Science as altruism, 335. 
devices of, 360. 
its limits, 553. 
its own witness, 74. 
Schenck on sex control, 137. 
Schizomycetes, 163. 
Schleiden on ceils of plants, 147, 
152. 
Schloenbachia, 254. 
Schmankewitsch on development of 
shrimps, 112. 
Schopenhauer on freedom from mar- 
riage, 329. 
on marriage, 325. 
on pessimism, 315. 
on woman, 317. 
Schuchert on evolution of brachio- 
pods, 238. 
Schultze on cell structure, 147. 
€churman on ultimate truth, 341. 
Schwann on cells of animals, 147, 
152. 
Scott on unknown factors, 98. 
Sealed orders, 377. 
Sea urchins, development of, 237. 
urchin, egg of, 175. 
Sebastodes miniatus, 224. 
Secondary causes, 50, 51. 
Second nature, 264. 
Seelye on zodphytes, 69. 
Selection, 18. 
becomes adaptation, 26. 
of sensation, 261. 
Self-activity, 89. 
389 
Self and non-self, 259. 
Senescence of protozoa, 162, 
Senility, 282. 
Sensation and action, 259, 360. 
without action, 273. 
Sensations, practicality of, 370. 
Sensorium, 264. 
Servetus, burning of, 376. 
Sex control, 137. 
determination of, 136, 
Sexless embryo, 136. 
Sex, meaning of, 312. 
Sexus sequior, 323. 
Shipley on brachiopods, 238. 
Shore larks, 214. 
Sicanites, 236. 
Silva (Carmen) on prenatal influ- 
ences, 134. 
Simple components in development, 
103. 
Slavery, 288. 
Slums, degeneration in, 288. 
Smith, on fossil cephalopoda, 229, 
Sober mind, 358. 
Somatic protoplasm, ror. 
tissues, 158. 
Somerville, selective breeding, 19. 
Sparrow, increase of, 22. 
Special creation, 10. 
Species, analogy with words, 216, 
and varieties, 211. 
as divine ideas, 9. 
change with space, 14. 
change with time, 14, 219. 
definition of, 212. 
development of, 45. 
distribution of, r91. 
good and bad, 11. 
how defined, 215. 
meaning of, 1. 
number of, 2. 
of North American fishes, 12. 
origin of, 5. 
old idea of, 44. 
reality of, 44. 
uncertainty of definition of, 11. 
