A HISTORY OF SCIENCE 



Forbes, the discoverer of the 

 polarization of heat, iii. 278. 



"Force" of cohesion, v. 49. 



Fossil beds of America, the, 

 finest known, iii. 106. 



Fossil horse described by Pro- 

 fessor Marsh, iii. 108. 



Fossil man, the collection of M. 

 Boucher de Perthes, iii. 100. 



Foster, Sir Michael, permanent 

 secretary Royal Society of 

 London, v. 17. 



Franco, Peter, itinerant surgeon, 

 ii. 182. 



Franklin, Benjamin, electrical 

 experiments, ii. 286; his theory 

 of electricity, ii. 288; his 

 battery, ii. 289; invents the 

 lightning-rod, ii. 290; proves 

 that lightning is electricity, ii. 

 293; his theory concerning 

 the aurora borealis, iii. 173; 

 concerning the vapor of water, 

 iii. 177. 



Fraunhofer, Joseph, the per- 

 fector of the refracting tele- 

 scope and the "heliometer," 

 iii. 60. 



Fresnel, Augustin Jean, cham- 

 pions Dr. Young's wave theory 

 of light, iii. 226; elected a 

 member of the French 

 Academy, ibid. 



Fuhlrott, Dr., his discoveries in 

 a cave at Neanderthal, iii. 102. 



GALE REPERCUTEE, iv. 204, 205. 



Galen, the last great scientist 

 of the Alexandrian school, i. 

 272; a tireless worker, i. 277; 

 his erroneous conceptions re- 

 garding the heart, i. 278; his 

 treatment of the ulner nerve, i. 

 279; his treatment of Emperor 

 Marcus Aurelius, i. 280; his 

 system of teatment, i. 281 ; his 

 erroneous theories about res- 

 piration and the pulse-beat, i. 

 282; his observations of the 

 skin and heart, i. 283. 



Galileo, Galilei, life and work, ii. 

 76; construction of telescope, 



ii. 78, 253; telescopic ob- 

 servations, ii. 78, 79, 80; dis- 

 covery of sun-spots, ii. 80; 

 trial for heresy, ii. 81; pub- 

 lication of his work, ii. 83; 

 extract from his work, ii. 

 84; experiment at Pisa, ii. 

 94; theory in regard to pro- 

 jectiles, ii. 95; mechanical dis- 

 coveries, ii. 98; experiments 

 with inclined planes, ii. 100; 

 with pendulum, ii. 100; ex- 

 periments with fluids, ii. 105; 

 account of his experiments 

 with floating bodies, in his 

 own words, ii. 106; invents the 

 thermometer, ii. 119. 



Gall, Dr. Franz Joseph, studies 

 in phrenology, iv. 247. 



Gallium discovered, iv. 68. 



Galvani, Luigi, the discoverer of 

 the new agent galvanism, 

 iii. 229; his experiments with 

 frogs' legs, iii. 230. 



Ganglion cells, studies of, iv. 

 279. 



Gas, term coined by Van Hel- 

 mont, ii. 186. 



Gases, liquefied, v. 40-42; meth- 

 ods used, v. 45, 46; Dewar's 

 vacuum vessel for holding, v. 

 53; new, discovered by Dr. 

 Ramsey, v. 84; questions 

 raised by discovery, v. 89-91; 

 their relation to the con- 

 duction of electricity, v. 93. 



Gastric juice, Reaumur's ex- 

 periments with, iv. 89 ; Spallan- 

 zani's and Hunter's theories 

 oi,ibid.; action of, after death, 

 iv. 90; hydrochloric acid dis- 

 covered in, iv. 129; pepsin, 

 active principle in, ibid. 



Gay-Lussac, Joseph Louis, ex- 

 periments with gases, iv. 42. 



Geber, Arabian chemist, ii. 20. 



Genealogical tree, Haeckel's, re- 

 garding the ancestry of man, 

 v. 172; the "missing link," 



v - J 73- 



General science affected by the 

 revival of learning, ii. 46. 



282 



