INDEX OF SUBJECTS. 



425 



Geology, 21, 57, 58, 59, 84, 87, 105, 

 108, 115, 173, 194, 276, 284, 307, 

 317, 344, 345, 361, 362, 375, 382. 



Geometry, 21, 90. 



Graphs, 109. 



Habit, 39, 191-192,345,410; thought 

 as controlled, 34-36; as result- 

 ing from the struggle for existence 

 among ideas, 38; its nature, 96, 

 353-354; of generalising, 97, 

 336-342 ; generalising a capricious 

 now, 102; of methodical scienti- 

 fic procedure, 199-200; acquisition 

 of habits, 209; study of habits, 

 297-298; habitual alertness, 308-312. 



Heat, 42-43. 58, 78, 86, 105, 276, 317, 

 343. 355, 368, 371-372, 375. 



Heredity, 277, 352, 376; child mind 

 dependent on cultural rather than 

 on hereditary factors, 24; problem 

 of -*- and culture discussed, 156; 



- in animals and man, 268-269. 

 Herschel, Sir J., on the character of 



the true philosopher, 5; on Bacon 

 as the father of inductive logic, 

 45; his method, 49; on observa- 

 tional methods, 59; on causal view, 

 87 ; on liberty and licence, 89 ; on 

 ancient and recent species, 183; on 

 prejudice, 193; on hypotheses, 211; 

 on study of exceptions, 276. 



Hibernation, 78-79. 



History, 115, 194. 



Homologies, importance of, 194, 

 269-270. 



Huxley, L. T., on Bacon, 136-137; 



- on the method of science, 147. 

 Hygiene, 2, 3, 19, 33, 169, 224, 382; 



diet, exercise, clothing, moral sanity 

 and virility, 8; education in , 

 224; historical classification of 

 and medicine, 230; religion of 

 health, 253; main problems of , 

 and the prevention of infectious 

 diseases, 333. 



Hypothesis, 44, 52, 77, 89-98, 365; 

 convention and , 20; Mill's re- 

 liance on hypotheses, 52; relation 

 of -- to observation, 59-60, 97; 

 logicians over-stress its importance, 

 89; definition of , 89-90; the 

 terms supposition, conjecture, sur- 

 mise, suggestion, guess, assump- 

 tion, not equivalents of , 91 ; 

 working , 91, 288; Mill's view 

 of the formation of a , 91-92; 

 a - - not a mere supposition, 92 ; 

 hypotheses have mostly a collec- 

 tive origin, 92-93 ; a slowly de- 

 velops in the individual's mind, 

 93; Newton and the gravitation , 



Darwin freely adopted suggestions 

 from others, .lenner as summariser, 

 1)4; all statements are assumptions, 

 95; genesis of hypotheses, 95-97; 

 Mill's hypothetical method, 97; 

 a is frequently necessary to ob- 

 servation, 97; frequently almost 

 pure conjectures guide scholars, 

 98; a generalisation is a special 

 form of , 98; verifying an un- 

 substantial wasteful, 114-115; 

 proof of , 115-117; need of sys- 

 tematically framing hypotheses, 

 210-211; wherever we use the 

 memory, we frame hypotheses, 210; 

 what a methodology must assure 

 as regards hypotheses, 210-211 ; 

 aiming at the most extensive hypo- 

 theses practicable, systematically 

 verifying, improving, and extend- 

 ing it, having a sound foundation 

 for it, 211 ; in deductive pro- 

 cess, 373-374. 



Hysteria, 158. 



Imagination, 20, 364; scientific use of 

 , 283-289; limited scope of , 288. 



Improvements, method of discovery 

 of, 97 ; each one can aim at in 

 his or her vocation, 198; rules for 

 suggesting , 336. 



India's industrial immaturity due to 

 environmental causes, 242. 



Induction, 32, 44, 45, 97, 132-142 ; - 

 will eventually become less im- 

 portant than deduction, 21, 118,119; 

 Descartes' attitude towards induc- 

 tion, 47; meaning of induction in 

 Mill, 51 ; Mill on causal view of , 

 86; position of complete or perfect 

 s, 106-108, 118; mathematical 

 and inductive procedure essenti- 

 ally identical, 130-132; Mill's de- 

 finition of , 132-133; definition 

 of , 133, 134; deduction included 

 in inductive process, 134; Macaulay 

 on Bacon, 135-142; Huxley on 

 Bacon, 136-137; place of in books 

 on logic, 161-162. 



Infectious diseases, prevention of, 8, 

 139. 



Insanity, cause according to Freud, 

 158. 



Instinct, 20, 36, 52, 134, 294, 320-325; 

 theory of human conduct as prima- 

 rily determined by s, definition 

 of problem, 155-156; in animals 

 and man, 268-269. 



Instruments, 21, 32, 150, 365; scienti- 

 fic , wide employment of , * s : 

 use of -- in observation and ex- 

 periment, definition of , use and 



