INDEX 



265 



Fire, Descartes's conception 



of, 90. 



Fiske, John, naturalism, 237. 

 FitzGerald-Lorentz, effect of 



motion on matter, 160. 

 Fizeau, the velocity of light in 



moving media, 177. 

 Force, as the basis of science, 



118. 

 Foucault, velocity of light in 



transparent media, 19. 

 Franklin, Benj., fluid theory 



of electricity, 25. 



Galileo, on sensation as the 

 postulate of science, 32; 

 founder of experimental sci- 

 ence, 39, 187; classical me- 

 chanics, 142. 



Gassendi, atomic theory, 8, 85. 



Genealogies, eugenics, 255. 



Generalization, a necessity, 194. 



Geometry, its postulates com- 

 pared with those of experi- 

 mental science, 12 ; the basis 

 of science, 79. 



Goethe, restraint in science, 

 58. 



Guericke, von, theory of elec- 

 tricity, 108. 



Hannequin, atomic theory, I ; 



definition of mechanics, 118. 



Heat, Descartes's hypothesis, 



95- 



Helmholtz, von, conservation 

 of energy, 86; vortex rings, 

 131 ; stagnant ether, 161. 



Heraclitus, continuity of mat- 

 ter, 77. 



Hertz, H., opinion of Max- 

 well's equations, 37 ; electro- 

 magnetic waves, 160. 



Histories of science, their de- 

 ficiencies, 217. 



Hobbes, on the sensations, 233, 

 234 ; metaphysical system, 

 235; n the barometer, 236; 

 egotism of mankind, 258. 



Hume, on the sensations, 233; 

 egotism and sympathy, 259. 



Huxley, on evolution, 241 ; on 

 eugenical selection, 249. 



Huygens, atomic theory, 8, 40; 

 theory of light, 19; correc- 

 tion of laws of impact and 

 motion, 86. 



Hypothesis, its danger, 16; 

 elimination not desirable, 37 ; 

 utility of, 42; apology for, 

 57 : not an indifferent sub- 

 ject, 59; Descartes's, the 

 most complete, 98; good and 

 bad aspects, 103; Boling- 

 broke on, 104 ; and symbol- 

 ism, no; a tentative hypoth- 

 esis of electricity, 140; its 

 value, 144; effect on society, 

 192; as generalization, 195; 

 Poincare's classification, 200; 

 and ethics, 225. 



Hypothetical method, 13; its 

 deceptions, 70. 



Idolatry of scientists, 209. 

 Impact, Descartes's laws, 85. 



Johnson, Samuel, reality of 

 matter, 206. 



Kant, axioms of mechanics, 6; 

 nebular hypothesis, 74; space 

 and time, 148. 



Kaufmann, variation of mass 

 with velocity, 132, 137. 



Kelvin, Lord (Sir Wm. Thom- 

 son), models of atoms, 36, 

 190; theory of vortex atoms, 

 41, 48, 131 ; size of atoms, 

 44; origin of life, 117; 

 quantitative measurements, 

 MS- 



Lagrange, axioms of mechan- 

 ics, 6; equilibrium of bodies, 

 6; Mecanique analytique, 7; 

 no criterion for truth, 18. 



Laplace, Systeme du monde, 7 ; 

 materialistic attitude, 8, 212; 

 his mechanistic theory, 9; 

 nebular hypothesis, 7.) 

 locity of propagation of 

 gravitational energy, 118; on 

 the inductive method, 232. 



Larmor, Sir Joseph, properties 

 of the ether, 19, 53. "; 



