INDEX. 



635 



MET 



Method of least squares, discovery 



by the, 511 

 . of means, discovery by the, 611 



of obtaining an explanation of 

 results, 450-451 



- of research, the partnership, 

 275 



- of residues, discovery by the, 

 423, 611 



Methods of manipulation, advan- 

 tages of improved, 314 

 -of discovering causes, 421 



of discovery, 464 



concrete character of the, 



457 



Microphone, the, 472 

 Microscope, invention of the, 476 

 Miles's discovery of a pencil of 



rays from an electrified point, 



567 

 Mind, its subjection to the great 



principles of nature, 127-133 

 Mineral constituents of plants and 



animals, c., discovery of, 539- 



540 



Minerals, discovery by investiga- 

 ting peculiar, 503-505 

 Missing planet, discovery of the 



probable existence of a, 488- 



587 

 Mitscherlich's discoveries, 229, 



506, 553 

 Mode of conducting a research, 



377-381, 385, 389, 391 



of forming new hypotheses, 

 367, 369-370 



of planning an experiment, 

 308-312 



Modern theory of chemistry, La- 

 voisier's, 595-596 

 Modes of discovery, 9, 455-4C6 



difficulty of classifying, 

 453-456 



inductive and deductive, 



524-525 



of proof, 352-353 



of transforming propositions, 

 339 



Moisture from exploded oxygen 

 and hydrogen, discovery of, 541 



NAT 



Mojon, near discovery of electro- 

 magnetism by, 180 



Molecular changes in iron wire, 

 discovery of, 519, 548 



heat evolved by, 519 



movements in iron wire, dis- 

 covery of, 33 



change in sulphate of nickel, 

 discovery of, 553 



Molecules of a gas, their immense 

 number, 31 



their velocity of move- 

 ment, 31 



of water, their magnitude and 

 number, 31 



Moon, discovery of the cause of 



libration of the, 608-609 

 respecting the existence of 



life on the, 587 



face of the, 543, 608 



Moon's influence on the tides, 31 

 Moons of Jupiter, discovery of, 



475, 573 

 Morality, rules of, based upon the 



principles of science, 521 

 Mousson and others' discovery of 



some of the effects of enormous 



pressure, 559-560 

 Movements of a magnet affected 



by metals, discovery of, 570 

 Mozart's sensitiveness to musical 



impressions, 42 



Multiplication of effects, 165, 415 

 Muschenbroeck's invention of the 



Leyden jar, 234, 480 



observation of muscular con- 

 traction by electricity, 492 



Muscular contraction produced by 

 electricity, discovery of, 492, 

 554 



ATATTERER'S discovery of lique- 



ll fied gases, 551 



Natural history, discoveries in, 



how made, 571 



phenomena, complexity of, 29 

 Natural selection, Darwin's theory 



of, 181, 603-604 

 Nature, immensity of, 29 



