438 



INDEX TO VOLUME III. 



HEATH, J. M. 



combustion or calorific power per 

 pound of coal, 245 ; definition of, 

 88 ; (dynamical theory of, 88 ; 

 adopted by Siemens's, C. W., 105); 

 (engine, duty of, on what depen- 

 dent, 257 ; losses in, 189) ; loss in 

 conversion of, into force, 191 ; 

 Mayer and Joule's labours on, 88 ; 

 mechanical effect, conversion of 

 into, losses in, 341, and paper by 

 Siemens, C. W., on, reference to, 

 104 ; and mechanical energy, rela- 

 tion of, Clausius, Rankine, Seguin, 

 Helmholtz, Tait, and Thomson, 

 reference to, 184, 185 ; as a mode 

 of motion, by Tyndall, Professor, 

 185 ; motion of particles of sub- 

 stance heated, 88 ; by radiation, 

 93 ; by sun's rays focussed in 

 lenses, 93 ; utilization of, and other 

 natural forces, 182. 



Heath, J. M., manganese added to 

 cast steel by, 140. 



Heath on mechanical puddling, re- 

 ference to, 149. 



Heating furnace, consumption of, ten 

 times what theoretically required, 

 81. 



Heating gas for domestic and other 

 purposes, 100, 254 ; employment 

 of, result of, 252 ; and illuminat- 

 ing gas, separate supply of, from 

 same retort, 339 ; importance of, 

 222, 239 ; price of, 253 ; purifica- 

 tion, high, of, not necessary, 

 252. 



Heaton's process of decarburization, 

 60, 61. 



Helmholtz, energy, researches on, 

 reference to, 325 ; sun's heat, con- 

 servation of, hypothesis of, 295. 



Hemp-covered cable, objections to, 

 23. 



Henderson, G., ferro-manganese in 

 steel manufacture, introduced by, 

 142. 



Hennesey's standards, 118. 



HOUSES. 



Hero of Alexandria, reference to, 

 116. 



Herschel, Sir J., on sun's stormy 

 region, 307. 



Herschel and Smyth on gaseous 

 spectra in vacuum tubes, 311. 



High-pressure boiler, action within, 

 with heat uniform and suddenly 

 varied, 298. 



High-pressure engine, wastefulness 

 of, 94. 



High prices, results of, to employers 

 and employed, 128. 



Himly's, Prof., dynamo-electric ma- 

 chine for separation of metals, 

 179 ; electro-gilding, connection 

 with, 282 ; fusion, temperature of, 

 measurement of, 121 ; gunpowder 

 proposed by, uninjured by damp, 

 353. 



Hirn's, G. A., pandynamometer, re- 

 ference to, 120. 



Hjorth, electric transmission of power 

 suggested by, 405. 



Holley, A. L., labour saving under 

 guidance of, in steel making, 139 ; 

 steel definition, International 

 Committee on, member of 147. 



Holmes, magneto-electric current 

 applied by, 395. 



Honey-combing in steel containing 

 0'5 per cent, carbon, removed by 

 dead melting, 144, containing - 2 

 per cent, removed by adding man- 

 ganese, 144. 



Hooker, Sir J., cultivation of india- 

 rubber and gutta-percha plants 

 by, 173. 



Hopkins, Gilkes & Co., puddling 

 mechanical, reference to, 149. 



Hopkinson, J., electric hoist, 404 ; 

 on electric transmission of power, 

 329. 



Horizontal attraction meter, 124. 



Hot radiating fire imitates sun, 246. 



Houses built to be sold not lived in, 

 96. 





