INDEX. 



771 



mann, ib. ; on " particulate " inheri- 

 tance, 615 ; on law of distribution, 

 617 ; on law of regression, 618. 



Galvani, discoveries of, i. 363, ii. 150 ; 

 galvanic current, 233 ; animal elec- 

 tricity, 474. 



"Gamma" function, ii. 696. 



Garnett, R., on Georg Forster, i. 52 ; 

 179. 



Garnett, W., and Campbell, 'Life of 

 Clerk-Maxwell,' ii. 599. 



Gartner, investigations of, ii. 415. 



Gases, liquefaction of, i. 316 ; the 

 kinetic theory of, 425, ii. 34 ; i. 

 433. 



Gaskell, Dr, cerebro-spinal nerves, ii. 

 429; analysis of process of "meta- 

 bolism," 442. 



Gassendi taught at the College de 

 France, i. 107 ; 385. 



Gassiot, experiments with vacuum 

 tubes, ii. 190. 



Gatterer of Gottingen University, i. 

 165. 



Gauss, Carl Fr. , i. 44, 45 ; orbit of 

 Ceres, 54 ; works of, 82 ; and Weber, 

 the telegraph, 92, 367 ; ' Disquisi- 

 tiones Arithmetics;,' 105, 120, ii. 682; 

 Lobatchevski and Bolyai, i. 161 ; and 

 Humboldt, 167; and Zach, 177; 

 178 ; mathematical researches, 181 ; 

 182 ; least squares, 183 ; 184, 185, 

 188, 189, 191, 200, 207, 211 ; "exact 

 habit of thought," 222 ; 231, 238, 247 ; 

 measurement of magnetic action, 265 ; 

 303 ; absolute measurements, 309, 

 369 ; astronomical work of, 314, 331 ; 

 measurements of, 322 ; ' Theoria 

 motus corporum ccelestium,' 324 ; 

 calculus of probabilities, 325 ; 352 ; 

 Coulomb's methods, 360, 362; 365; 

 importance of his work, 384 ; ' ' Top- 

 ologie," ii. 63 ; researches into elec- 

 trical phenomena, 67 ; 76 ; electro- 

 magnetic measurements, 78 ; system 

 of absolute measurements, 117 ; arith- 

 metical discoveries of, 124 ; influences 

 Helmholtz, 150; 197, 254; science 

 of chances, 568 ; theory of error, 574 ; 

 575 ; method of least squares, 576 ; 

 doctrine of probabilities, 577 ; law 

 of error, 616 ; and Newton compared, 

 630 ; rediscovery of Ceres, ib. ; 

 pioneer of modern mathematics, 636 ; 

 Bessel on, ib. ; his style criticised by 

 Abel, 637; 640; his fundamental 

 theorem, 644, 688 ; on convergeney, 

 646 ; his work on higher functions, 

 648 et seq. ; on fundamentals, 652 ; 



his influence on Bolyai, Lobatchevski, 

 and others, 652 ; anticipates the work 

 of others, ib. ; compared to Goethe, 



653 ; on extended system of numbers, 



654 ; reforms theory of numbers, 680 

 et seq., 720; on determinants, 682; 

 686, 688, 693, 695, 697, 698 ; on con- 

 formal images, 701 ; on non-Euclidean 

 geometry, 710, 713 ; measure of 

 curvature, 714 ; theory of congru- 

 ences, 723 ; on mathematical calculi, 

 724 ; on bi-quadratic residues, 725 ; 

 732 ; not a great teacher, 646, 743. 



Gauss and Gerling, ii. 713. 



Gauss and Schumacher, correspondence, 

 ii. 710. 



Gauss and Weber, telegraph, i. 92, 

 367 ; school of, ii. 702. 



Gay-Lussac, Memoirs of, i. 83 ; ' An- 

 nales de Chymie et de Physique,' 

 189 ; 190 ; organic analysis, ib. ; 

 chemical discoveries, 398, 407 ; ex- 

 periments, 425 ; 426 - 429 ; Fresnel's 

 ' Memoire sur la Diffraction,' ii. 25 ; 

 visit to England, 27 ; experiment in 

 heat measurement, 109 ; 155, 592. 



Geddes and Thomson, 'The Evolu- 

 tion of Sex,' ii. 227, 454, 458, 459; 

 sexual selection, 344; "Reproduc- 

 tion, "348. 



Gegenbaur, school of Darwinism in 

 Germany, ii. 436. 



Gehlen, 'Allgemeines Journal fur 

 Chemie,' i. 41. 



Geikie, Sir Archd., quoted on Playfair's 

 ' Huttonian Theory of the Earth,' i. 

 283; G. Wilson and, 'Memoir of 

 E. Forbes,' 288. 



Geissler, fellow - worker with Plucker, 

 ii. 76 ; electrical researches, 189 ; 

 vacuum tubes, 190. 



Geitel (see Elster), ii. 190. 



Generalisation, process of, in mathe- 

 matics, ii. 638 ; 650. 



Generalised co-ordinates, Plucker, ii. 

 673. 



" Genesis," ii. 279. 



Genetic view of nature, ii. 276, 290 ; 

 in Germany and France, 321 ; triumph 

 of, 328 ; on a large scale, 845 ; 

 strengthened by physics and chem- 

 istry, 355. 



Genetics, ii. 213. 



Genius, latent thought the material of, 

 i. 8. 



' Gentleman's Magazine,' ii. 679. 



Geography, historical, i. 294. 



Geological Society, i. 290. 



Geology, ii. 290. 



