INDEX. 



641 



RES 



Kesearch, scientific, deficiency of 

 at our old Universities, 284 



difficulties in selecting a 



subject of, 375 



sometimes hindered by 

 knowledge, 301 



starting points of a, 465 



the love of truth as a motive 



to, 289-290 

 time as a necessary condition 



of success in, 273 

 Researches, suggestions of new, 



394, 469, 513, 563, 605 

 Eesidual causes, detection of, 431- 



432 



phenomena, 85, 195, 201 

 discovery of, 559 



instances of discovery of, 



433 



Residues of manufactures, dis- 

 covery by examining, 505-507 



discovery by the method of, 

 611 



Resisting medium in space, dis- 

 covery of a, 589-590 



Results, classification of, 398- 

 399 



future quantitative, 394-395 



of experiments, explanation of, 

 354-355, 447 



Retardation of signals in sub- 

 marine cables, discovery of, 

 569 



Rewards of scientific research, 

 289 



Reymond's discoveries of electric 

 currents in animal tissues, 574 



Rheostat, invention of the, 486 



Rhythm, the principle of, 520 



Richter's discovery of the variable 

 length of a seconds pendulum, 

 234 



Ritchie's discovery of the che- 

 mical properties of common 

 acids and bases, 541 



of the rotation of water by 



electro-magnetism, 537 



experiment of suspending a 

 needle by means of magnetism, 

 537 



SAF 



Ritter's discovery of the ultra-vio- 

 let rays of the spectrum, 544, 

 573 



invention of the ' secondary 

 pile,' 484 



Rock-salt, discovery of its trans- 

 parency to heat, 479, 531 



Roemer's discovery of the velocity 

 of light, how made, 587-589, 



Romagnosi's discovery of the in- 

 fluence of a voltaic current on a 

 magnet, 180, 570 



Romas 's invention of the electric 

 kite, 480 



Roscoe's discoveries respecting 

 vanadium, 505 



Rosse's, Lord, discoveries respect- 

 ing nebulas, how effected, 560 



Rotation of bodies by heat, dis- 

 covery of, 479 



of water by means of electro - 

 magnetism, 537 



of an electric wire by terres- 

 trial magnetism, 537 



of a magnet and electric wire, 

 discovery of the, 537 



of a metal ball by heat, dis- 

 covery of the, 494 



Royal Society catalogue of scien- 

 tific papers, cost of the, 220-221 



establishment of the, 284- 



285 



Rubidium, discovery of, 507 



Rule for overcoming difficulties 

 in a research, 380 



of discovery, Glauber's, 501 

 Rules for guidance in research, 



462 



of morality based upon the 

 principles of science, 521 



of the syllogism, 351 

 Rumford's experiments respecting 



heat evolved by friction, 496, 

 530 



SABINE'S discoveries respecting 

 terrestrial magnetism, 570, 582 

 Safety-lamp, invention of the, 

 530-531 



T T 



