634 



ISDEX. 



MAN 



Man's greatness in creation, erro- 

 neous hypothesis of, 120 



Manganese, discovery of the pro- 

 perties of, 556, 557 



Manipulation, treatises on scien- 

 tific, 315 



advantage of improved methods 

 of, 314 



Manufactures, discovery by exami- 

 ning residues of, 505-507 



Mario tte's discovery respecting 

 the elasticity of air, 526 



Mariner's compass, invention of, 

 569-570 



Marriage, its influence upon the 

 power of research, 278-282 



Maskelyne's discovery of the gra- 

 vitative attraction of a moun- 

 tain, 586 



Mathematical intuition, 40-41 



theory of electro-magnetic ac- 

 tion, discovery of, 593 



Mathiessen's discoveries in electric 

 conduction resistance, 486 



Matter, illustrations of the com- 

 plexity of, 33 



indestructibility of by man, 161 

 Mayer's inference that magnetism 



varies as the square of the dis- 

 tance, 592 



Mayow's discovery of 'fire-air,' 

 539 



Means, discovery by the method of, 

 611 



Measurement, discoveries made by 

 means of, 388, 390 



of electric conduction resist- 

 ance, 537 



of ideas, 55 



value of accurate, 393 



in detecting causes, 431 



Mechanical aptitude as a means 



of success in research, 241 



equivalent of heat, Joule's 

 discovery of the, 531, 591 



Seguin and Mayer's hy- 

 pothesis of the, 591 

 Mediate ideas, 51, 353 



inference, 347, 349, 353, 354 

 value of, 355 



MET 



Melloni's discoveries, 228, 479, 



531, 548, 574 

 Memoranda, advantage of, 311, 



370-371 

 Memory, 59, 63, 68, 70, 71, 72 



as a means of success in re- 

 search, 63 



unity in diversity as a bond of, 

 112-113 



Mendlejeef's prediction of new 

 elementary substances, 204, 

 232 



Mental action, its accordance 

 with the chief laws of the phy- 

 sical forces, 605 



processes for extracting know- 

 ledge from statements, 336- 

 342 



Mercury, discovery respecting the 

 planet, 609 



discoveries respecting the elec- 

 trolytic movements of, 545, 547 



Merit of discovery, to whom due, 

 13 



Metals, leaf, discovery of ignition 

 of by voltaic current, 547 



Metal, Tennant's discovery of a 

 new, 518 



Meteorological discoveries, sug- 

 gestions of new, 469-470 



discovery, how effected, 575 



observation, 323 



Meteors, discoveries respecting, 

 30, 543, 565, 587, 609-610 



Method of agreement, discovery 

 by the, 421 



- of averages, discovery by the, 

 434-435 



- of coincident variation, dis- 

 covery by the, 422 



- of curves, discovery by the, 

 610-611 



- - of difference, discovery by the, 

 421 



of discovering truths by infer- 

 ence, 583-584 



exceptional cases, 198 

 discovery, the usual, 457 



of gradation, use of in research, 

 613 



