624 



INDEX. 



ELE 



Electricity, discovery by examin- 

 ing the effects of, 555 



of Franklin's theory of, 534 



of magneto, 537, 548 



of the mutual dependence 



of the two kinds of, 567 



of the earliest fact in vol- 

 taic, 535 



of the great velocity of travel 



of, 511, 533 



of two kinds of, 533, 577, 



591-592 



evolved by pressure of Ice- 

 land spar, &c., discovery of, 535 



frictional, discovery of, 491 



has no weight, discovery that, 

 533 



hydro, discovery of, 493-494, 

 568 



identity of from various sources, 

 509 



produced by animal tissues, 

 discovery of, 568 



pyro, discovery of, 491 



polarity of, 534 



thermo, discovery of, 537, 553 



voltaic, discovery of, 492, 543 

 Electro-chemical action, inven- 

 tion of the theory of, 593 



Faraday's discovery of 



definite, 485 

 series, invention of, 593 



chemistry, discoveries in, 546- 

 547 



origin of, 493 



chromy, discovery of, 485 



deposition of potassium and 

 sodium, discovery of, 485 



origin of, 493 



dynamic induction, discovery 

 of, 518, 522-523 



dynamics, discovery of the 

 theory of, 593-594 



solution of the general pro- 

 blem of, 610 



Electrolysis of acids and ammonia, 

 discovery of the, 483, 554 



of water by means of thermo- 

 electricity, discovery of the, 

 537 



EQU 



Electrolysis of water, discovery of 

 the, 535-536, 546-547, 544 



of the source of acid 



and alkali in the, 536 



Electrolytic movements of mer- 

 cury, 545-547 



transfer, discovery of, 483 



vibrations and sounds, discovery 

 of, 238, 518-519, 545, 547 



Electro-magnetic discoveries of 

 Ampere, 485, 536, 547, 593 



-magnetism, discovery of, 536, 

 547, 593 



of the influence of screens 



upon, 539 



of the laws of, 537, 547 



nearly discovered by Mojon 



and Eomagnosi, 180 



rotation of water by means 



of, 537 



Electrometers, quadrant and ab- 

 solute, of Sir W. Thomson, 481 

 Electrophorus, invention of, 480 

 Electroscope, Bohnenberger 's gold- 

 leaf, 481 

 Electro-thermancy, discovery of, 



548 



Electrotype, discovery of, 485 

 Elementary substances, false dis- 

 coveries of, 135-137 



limits of number of, 15 



prediction of new, 204, 524 



Embryology, discoveries in, 579. 



603 



Empirical facts, 84 

 Encke's discoveries, 589-590, 609 

 Encouragement of research, in- 

 fluence of international, 287 



received by foreign discoverers, 

 265 



Energy, its indestructibility by 



man, 161 

 Enthusiasm in scientific research, 



117, 241, 258 

 Equinoxes, discovery of the cause 



of the precession of the, 608 

 the precession of the, 



565 



Equivalency of forces, 164-165, 585 

 Equivalent causes, 417 



