802 



INDEX. 



graphy, 329 ; ' Popular Lectures and 

 Addresses,' 330, ii. 61 ; improve- 

 ments in mariner's compass, i. 331 ; 

 mechanical theory of gravitation, 

 344 ; Boscovich's theory, 358 ; elec- 

 trical measurements, 366 ; cohesion 

 and capillary attraction, 376 ; on 

 " capillary attraction " quoted, 425 ; 

 "chirality," 432, ii. 22; "On the 

 Size of Atoms," i. 437; "Steps to- 

 wards a Kinetic Theory of Matter," 

 456; quoted, ii. 39,182, 184, 190; 

 sodium, 48 ; wave-motion, 53 ; optics, 

 55 ; vortex theory, 57, 58, 63 ; on gyro- 

 stat, 61 ; thermodynamics, 62, 603 ; 

 diamagnetism, 74 ; on "permeability," 

 75 ; electro-magnetics, 77 ; Faraday 

 and Clerk-Maxwell, 78, 79 ; reprints 

 of papers quoted, 803 ; physical 

 lines of force, 81 ; electrical re- 

 searches, 86; "vortex filaments," 

 89 ; vibrations of the ether, 91 ; in- 

 dependence of Mayer's writings, 97 ; 

 and Mayer's hypothesis, 109; "en- 

 ergy," 114 ; "work " and " energy," 

 115; Mayer, and Joule, 116; ab- 

 solute measurements in thermotics, 

 117; Carnot's 'Puissance motrice,' 

 118 ; dissipation of energy, 119, 131, 

 132, 364, 598 ; Sadi Carnot's heat 

 theory, 123 ; perpetual motion, 124- 

 126 ; experiment, 127 ; Sadi Carnot, 

 130 ; experiments of Joule and Reg- 

 nault,137 ; "potential " and "actual " 

 energy, 139 ; physical view of nature, 

 141 ; Regnault's measurements, 152 ; 

 167; thermodynamic "motivity," 

 168, 169, 594; "free energy," 173; 

 "available energy," and "entropy," 

 174, 594; 175, 179, 184 ; ether theory, 

 196 ; recognition of Kant, 284 ; 296 ; 

 "On Geological Time," 356; "Me- 

 chanical Energies of the Solar Sys- 

 tem," 358 ; on the spectroscope, 362 ; 

 Glasgow Address quoted, 363 ; cos- 

 mica! origin of life, 369 ; on the 

 dissipation of energy, i. 309 ; ii. 52, 

 404 ; irreversibility of natural pro- 

 cesses, 593 ; 699 ; his- theorem and 

 Dirichlet, 700 ; 704, 708. 



Thomson, William, and Sir G. G. 

 Stokes, contributions to mathematical 

 physics, i. 274 ; and Tait : ' Natural 

 Philosophy,' ib. 



Thorpe, ' Essays in Historical Chem- 

 istry,' ii. 158. 



Thought, the hidden world, i. 1 ; the 

 only moving principle, 2 ; Max 

 Miiller on definition of, 4 ; many 



meanings of, 5 ; forgotten and unex- 

 pressed, 8 ; value of contemporary 

 records of, 10 ; unity of, a product of 

 the nineteenth century, 16 ; equi- 

 valents in German and French, 24 ; 

 conception of, not specifically Eng- 

 lish, 26; definition of, 33; not ex- 

 hausted by science or philosophy, 

 66 ; unmethodical, 68 ; religious, 69 ; 

 personal or subjective, 70 ; scientific, 

 philosophical, and individual, 72 ; of 

 nineteenth century characterised, 77 ; 

 constructive, not destructive, 80 ; 

 exact, historical, and critical habits 

 of, 222 ; characteristics of higher 

 mental work in England, 239 ; char- 

 acteristics of English, 249 ; scientific, 

 absence of schools of, in England, 

 250 ; history of, ii. 627 ; not history 

 of knowledge, 628. 



Thouin, agriculture at the Ecole nor- 

 male, i. 112. 



Thucydides, a model historian, i. 7. 



Tiedemann, Fr., chemistry of the living 

 body, ii. 391 ; 317. 



Tilloch, 'Philosophical Magazine,' i. 41. 



" Timbre," ii. 488. 



Tisserand, ' Comptes Rendus,' i. 377 ; 

 quoted on Newton's law, 378. 



Titchener, E. B., criticism of Miinster- 

 berg's work, ii. 522. 



Titius, Daniel, astronomical formula of, 

 i. 422. 



Tocqueville, A. de, quoted on contem- 

 porary records, i. 10. 



Todhunter, Isaac, his ( Histories,' i. 

 91 ; ' History of the Theories of 

 Attraction,' 98, 99, 308, ii. 698; 

 theory of probabilities, i. 120, ii. 

 568 ; ' History of the Theory of Prob- 

 ability,' i. 234; 'Life of Whewell,' 

 236, 262, 306 ; theory of elasticity, ii. 

 30 ; on Young's style, ib. ; on Eng- 

 lish science, ib. ; ' History of Elas- 

 ticity,' 33 ; quoted, 43. 



Todhunter and Pearson, ' History of 

 the Theory of Elasticity,' i. 376, ii. 43, 

 56. 



Tooke, Home, on words, i. 21 ; the 

 ' Diversions of Purley,' ii. 537. 



Tour, Cagniard de la, the siren, ii. 487. 



Traube, medical thermometry, ii. 389. 



Treitschke, ' Deutsche Geschichte,' i. 

 312 



Trembly, ii. 418. 



Trench, Archbishop, on words, i. 21. 



Treviranus, G. R., 'Biologie,' i. 194; 

 identity of all sciences of organic 

 life, ii. 217 ; 230, 261 ; biological 



