618 



INDEX. 



CLA 



Classification, the process of, 206- 

 207, 398 



artificial and temporary cha- 

 racter of our systems of, 205- 

 206 



failure of our systems of, 207 



best modes of, 207 



discovery by means of, 207-208 



basis of, 325, 327 



of crystals, 601 



of scientific ideas, 53 



of truths, its importance, 204- 

 205 



of substances, 208-209 



of physical and chemical phe- 

 nomena, 330-331 



of results, 398-399 

 Clearness of ideas, necessity of 



in research, 242 



Clocks, pendulum first applied to, 

 474 



Coal, discovery of the partial con- 

 version of wood into, 558 



Coexistence of matter and energy, 

 160 



Coincidence of change of matter 

 and its forces, 163 



meaning- of a, 444 

 Coincidences, discovery of, 429, 



444-447 



separable, inseparable, 445 



their frequency, 445 

 Colburn, the calculating boy,' 



40 



Colladon (and others), discovery 

 of the compressibility of liquids, 

 559 



Columbus's discovery of the varia- 

 tion of the magnetic needle, 

 518, 569 



Combined method of agreement 

 and difference, discovery by, 

 422 



Combustibility of the diamond, 

 discovery of the, 541 



Combustion, Cavendish's and La- 

 voisier's discovery respecting, 

 511-512 



Comet, consternation in Paris re- 

 specting a, 609 



CON 



Comet, discovery of by Halley, 228 



an exploded, 610 



Comets, number of, 30 

 Common acids, discovery of, 541 

 ' Common sense,' a source of error, 



118, 119 

 Comparison, power of, necessary 



to success in research, 248 

 basis of, 324 



the nature of the faculty of, 

 324-326 



cultivation of the power of, 

 331 



the basis of classification, 325 

 inference, 344-346 



and classification, discovery by 

 means of, 577, 579, 583 



Completion of researches, 396-397 

 Complex causes, 414, 431 



effects of heat, 33 

 Complexity of nature, 29 



matter, 32 



Composition of water, discovery 



of the, 544 



Compressibility of liquids, dis- 

 covery of, 559 

 Conceivability as a test of truth, 



101 



Concurrence of causes, 165 

 Concurrent causes, 415, 431 



and effects, how detected, 



430-431 

 Conditions and causes, 442 



fundamental character of, 442 



guiding, difficulty of discover- 

 ing, 443 



kinds of, 406, 436-437 



real, apparent, essential, re- 

 leasing, exciting, transmuting, 

 437-438 



determining, deflecting, guid- 

 ing, limiting, regulating, 439- 

 441 



discovery of static, 435, 442, 

 443 



permitting, obstructive, pre- 

 ventive, 441-442 



favourable to sleep, 39, 260-261 



necessary for acquiring ideas, 

 47 



