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, 1 08. 



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; on 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, 

 145. 



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, 74; ve- 

 locity of propagation of 

 gravitational energy, 118; on 

 the inductive method, 232. 



Larmor, Sir Joseph, properties 

 of the ether, 19, 53, 126; 



