430 



INDEX TO VOLUME III. 



DYNAMO-ELECTRIC. 



Dynamo-electric, or re-action prin- 

 ciple, 199, 220. 



Dynamo-electric current, applica- 

 tions of, 179, 331, 369. 



Dynamo-electric machine, con- 

 structive forms of, variety of, 368, 

 412 ; De Meriten's, 400 ; design 

 of points .in, 368 ; distribution of 

 steam engine power by, example 

 of, 180 ; efficiency of , 367 ; friction 

 in reduction of, 368 ; maintenance 

 of, low cost of, 368 ; power, per- 

 centage of, utilizable by, 179, 180 ; 

 principles, essential, involved in 

 public property, 413 ; resistance 

 of, dependent on external resis- 

 tance, 223 ; for separation of 

 metals, by Prof. Himly, 179, 180 ; 

 Shunt, 400 ; Siemens's, 400 ; sim- 

 plicity of, 368. 



Dynamo-electric principle, 162 ; ma- 

 chines made to test, question of 

 priority of manufacture of, con- 

 sidered, 166 ; publication, first, of, 

 163 ; Siemens, C. W., brought 

 before Koyal Society, 162 ; 

 (Siemens, Werner, original experi- 

 ments of, on, witnessed by Dove, 

 Magnus and Du Bois Keymond, 

 164; published by Berlin Academy, 

 162, 163, 164); (Varley's S. A., 

 claim as original discoverer of, 

 considered, 163, 165, 166 ; patent 

 provisional specification of private 

 document, 166) ; Sabine, E , on 

 priority of conception of, 165 ; 

 Wheatstone, C., brought before 

 Koyal Society, 162. 



Dynamo electricity, second law of 

 thermodynamics not involved in, 

 398. 



Dynamometer, electrical, 412. 



EADS'S, Capt., Tehuantepec ship 

 railway, 348. 



EDDYSTONE LIGHTHOUSE. 



Earth, a cinder ball, 88 ; consists of 

 combined matter, 87, 186, 187, 

 294 ; heat, internal of, 294 ; heat, 

 from sun to, 294 ; metals in, 

 generally found burnt, 87. 



Ebelmen, researches of, 126. 210. 



Ecole Centrale des Arts et Manu- 

 factures, 211, 215, 386 ; and Ecole 

 Polytechnique, difference be- 

 tween, 212 ; founded originally 

 by an association of sai-ans, 211 ; 

 scientific education, three years, 

 course of, 211 ; state school since 

 1860, 212 ; trains engineers for 

 private industry, 211. 



Ecole Polytechnique, 210, 21], 215 ; 

 admission to, 211 ; branches of, 

 Ecole des Ponts et Chausees. 210, 

 and Ecole des Mines, 210, 216 ; 

 civil service, places retained for 

 most successful students at, 211 ; 

 education at purely scientific, 211. 



Edison, electric current, division 

 of, by, 220 ; electric quantity, 

 measures of, 412 ; incandescence 

 light of, 268 ; microphone of, 267 ; 

 quadruples telegraphy developed 

 by, 168 ; (telephone, development 

 of, 284 ; with powdered plum- 

 bago, 169). 



Education, capital, 231 ; funda- 

 mental, 54 ; neglected in this 

 country, 233 ; (at School of Mines, 

 126 ; susceptible of improve- 

 ment, 126 ; usefulness of, 126) ; 

 (technical, 126, 230 ; necessity of, 

 recognized on the continent, 126 ; 

 processes, working of, not to be in- 

 cluded in, 127 ; in sciences bearing 

 on practice, 127 ; works on, early, 

 practical bias of, 126) ; universal 

 interest throughout the country 

 in, 54. 



Eddystone lighthouse, new, built by 

 Douglass, Sir J., 349 ; height of, 

 349 ; self distinguishing light for, 

 as proposed by Thomson, Sir Win., 



