INDEX TO VOLUME III. 



457 



viii.ucrn. 



Veli.eitv ..!' rl.rtrid! \ , :\-J>\. 

 Ventilating fireplace of Gallon, Capt. 



D., '.<;. 

 Volatile constituents, loss of, in coke 



ovens, L'l.'.. 



Volatile matter in coal, heat neces- 

 sary to volatilize. 245. 

 Volkmar's secondary battery, 334, 



410. 

 Volta on dielectrics affected by 



electrification, reference to, 3.~>;{ ; 



electric transmission of power 



suggested by, 4<l.">. 



WAGES, minimum, 128 ; payable by 



results, IL'S. 

 Wales, Prince of, Society of Arts 



President of, 367. 

 Wart maun, Prof., calorific capacity 



of liquids, measure of, 121. 

 Waste of food, 360, 3G1 ; of material, 



360, 364 ; of mechanical energy, 



360, 362 ; of personal energy, 360. 



361 ; prevention of, 3(55 ; Siemens, 

 C. W., on, 359 ; in steam engine. 



362 ; of time, 360. 



Water, boiled by electricity, 203 ; 

 combustion, a product of, 88 ; 

 (gat, objections to, 339 ; use of, 

 339) ; (pole, current, loss of, small 

 with, 261 ; description of, 261 ; 

 object of, 261) ; (power, result of 

 solar energy, 92 ; resorted to in 

 mountainous districts, 92 ; utili- 

 zation of, by high pressure mains, 

 136, and quick-working wire ropes, 



Waterton's hypothesis of conserva- 

 tion of sun's heat, 296. 



Watt, J., adverse circumstances, con- 

 test against, 56 ; conviction . of 

 ultimate success, 56 ; failing health 

 and means, 56 ; invention of steam 

 engine and condenser, 56 ; physi- 

 cal nature of steam, perfect con- 



VOL. III. 



wumvoimi. 



coption of, :,; ; steam jacket of, 

 discarded by his successor*, 5. 

 Watt's engine, 112, 232; improve- 

 ments, recent, in, 190. 

 Watt, suggestion of, as electrical 

 unit of power, by Siemens < '. \V.. 

 322, 411; relation of, to horse- 

 power, 412. 



Weber, absolute unit of, 33, 321 ; elec- 

 tro-magnetic telegraph founded 

 by, reference to, 74. 

 Weber suggested as electrical unit, 



322. 



Wedding, H., steel, definition, refer- 

 ence to, 147 ; steel definition, Inter- 

 national Committee on, member 

 of, 147 ; technical writings of, 

 reference to, 126. 

 Wedgewood's pyrometer, reference 



to, 121. 



Weld iron, definition of, 148. 

 Wheatstone balance or bridge, 34 ; 

 action of, illustration of, 35 ; de- 

 scription of, 35 ; testing by, 

 methods of, 35 ; simpler but less 

 sensitive than sine galvanometer, 

 37. 



Wheatstone, Sir C., capillary tubes, 

 experiments on effects of electri- 

 city on, 109 ; Clark, L., address of 

 on work of, 108 ; credit due to, very 

 high, 109 ; (dynamo-electric -prin- 

 ciple brought before Royal Society 

 by, 1 62, 397 ; cross-connection be- 

 tween armature and field, proposal 

 of, 399) ; French Academy, Tresca 

 address before, on. 109 ; rotating 

 mirror of, 119 ; Royal Institution, 

 memorial of, to, 109 ; as telegraph 

 inventor, reference to, 74 ; tuning- 

 fork arrangement of, 168 ; work 

 of, 109. 

 Whitehouse, method of testing joints 



of. 43. 



Whitworth (gauge, foundation of, 

 117, 417 ; modification of, proposed 

 for America, 420;) steel of, hydrau- 

 H H 



