264 



INDEX 



tion and impact, 85; classi- 

 fication of matter, 86; vor- 

 tices, 89 ; cohesion, 92 ; light, 

 92; heat, 95; the earth, 96; 

 his consistency of thought, 

 98; critique of his cosmog- 

 ony, 101, Bolingbroke's 

 opinion, 104; nature of elec- 

 tricity, 107; space as sub- 

 stance, 236. 



pufay, fluid theory of elec- 

 tricity, 25. 



Duhem, on science of ener- 

 getics, 22; on theories of 

 physics, 37. 



Egoism, as a scientific system 

 of ethics, 258. 



Einstein, definition of space, 

 109, 127, 153; electricity and 

 energy as entities, in. 



Einstein's Principle of Rela- 

 tivity, to harmonize modern 

 and Newtonian mechanics, 

 164 ; its postulates, 165 ; meas- 

 ure of time, 167; measure 

 of length, 169; variability of 

 mass, 172; mass and energy, 

 172; its postulates, 174; re- 

 striction of the relativity of 

 motion, 175; absolute veloc- 

 ity of light, 177; velocity of 

 sound and light, an illustra- 

 tion, 182; atomic nature of 

 electricity, 184; logical but 

 false, 184. 



Electricity, an entity, 42, 51, 

 63, 65, 107, no, 184; the 

 basis of mechanics, 158. 



Electrons, nature of, 55, 60, 

 131, 135, 138. 



Energetics, definition, n, 20; 

 value of, 24. 



Energy, the basis of science, 

 22; conservation of, 120, 128; 

 classification, 122, 133. 



Ether, a mechanical link, 10 ; 

 need for more than one, u; 

 and matter, 42; its prop- 

 erties, 43; elastic-solid and 

 electromagnetic, 52; massive, 

 109; recent ideas of, 109; a 



confession of ignorance, 125 ; 

 a plenum, 126; a new con- 

 ception of the, 162; a con- 

 venience only, 198; as a 

 reality, 202 ; as the explana- 

 tion of matter, 203; the re- 

 ductio ad absurdum, 204; 

 Lodge's definition, 208; as a 

 psychic medium, 208; as a 

 quasi-deity, 209. 



Ethereal, see Vortices. 



Ethics, present perplexity, 213; 

 science as the basis of, 214; 

 lack of criticism of sci- 

 entists, 215; effect of hy- 

 pothesis on, 225; material- 

 ism, 233 ; atheism, 233 ; sys- 

 tem of Hobbes, 235; science, 

 the guide to conduct, 237 ; 

 law of evolution not eth- 

 ical, 238 ; evolution and, 

 241 ; classification of natural- 

 ism, 243; egoism, 258; rela- 

 tion of science to, 260. 



Eugenics, as a science, 245; as 

 a system of ethics, 249; as 

 a police regulation, 252; 

 under guidance of physi- 

 cians, 252; under guidance 

 of legislators and the clergy, 

 253; under the social work- 

 ers, 254; lack of influence, 

 257- 



Eugenist, defined, 246. 



Euthenics, defined, 245; its 

 failure, 256. 



Evolution, as a law, 116; so- 

 cial, 212; discussed, 237; its 

 causes, 239; natural and re- 

 stricted, 241 ; spiritual, four 

 types of, 243. 



Experience, the basis of sci- 

 ence, 233. 



Experimentum crucis, 18. 



Fallacies, in Descartes's sys- 

 tem, 98. 



Faraday, the duty of science, 



107; theory of electricity, 



108; effect of dielectrics, 



160; nature of the ether, 

 161. 



