INDEX TO VOLUME I. 



485 



GENTLE BROWN. 



le I'-rown, revival of Hindoo 

 ' process by, 216. 



Gilchrist, P. O., phosphorus, elimina- 

 tiini of, discussion of paper by, 



li:,. 

 rs of steel, 407. 



Government tests of inventions with- 

 out patentee's co-operation an in- 

 terference with his rights, 457. 



Graphite unconsumed in blast fur- 

 nace, 327. 



Guns, effect of gunpowder on, 453 ; 

 internal chilling and subsequent 

 gradual cooling proposed to equa- 

 lise strain in, 400 ; steel better 

 than iron for, 453 ; use of steel 

 ensures lightness and strength in, 

 453 ; temperature, necessary ad- 

 justment of, for shrinking hoops 

 on, 453, 454. 



HACKNEY'S definition of steel, 316. 



Hackney.W., anthracite coke, manu- 

 facture of, 325-328 ; steel, manu- 

 facture of, 315-320, discussion of 

 papers by. 



Hard coke comes out with slag from 

 blast furnace, 327. 



Hard and mild steel equally strong 

 within limits, 395, 420, 423, 424. 



Hard steel rails, brittleness of, from 

 cold, 272. 



Hard steel rails used in France, 318. 



Hard untempered steel, 435. 



Hardness of steel, 313. 



Heat, absorption of in blast furnace, 

 262 ; application of, 209 (of com- 

 bustion of coke in the blast fur- 

 nace, 290 ; of gas-producer, low, 

 220) ; evolution of, in relation to 

 volume, 261 ; generation of in- 

 tense, 209 ; rendered latent in for- 

 mation of carbonic oxide, 262 ; (to 

 melt cinder in the blast furnace, 

 calculation of, 261 ; iron in the 

 blast furnace, calculation of, 261 ; 



IMPURITIES. 



iron in cupolas, 261 ;) in smelting 

 operations, viz., melting iron, melt- 

 ing ore, and transferring oxygen of 

 ore to carbon of coke, 260, 261. 



Heated steel, deflects before failing, 

 407. 



Heaton and Hargreaves' steel pro- 

 cess, 215. 



Heath, application of manganese due 

 to, 212, 380 ; Hindoo steel process, 

 revival of, by, 216 ; patents of, con- 

 tested, 212. 



High class steel, purity of, 377, 

 378. 



High pressure, multitubular boilers 

 unsuitable for, 372 (vessel to resist, 

 description of, 372 ; joints of, 372 ; 

 risk of explosion avoided in, 372 ; 

 system applicable to steam boilers, 

 373). 



Honeycombed structure reduced by 

 compression, 429, 430. 



Hot blast, 265 ; blast furnace econo- 

 my affected by, 276 ; blast fur- 

 nace gases affected by, 267 ; 

 stoves, combustion in, contrasted 

 with that in blast furnace, 279, 

 290 ; increases bulk of heat in 

 blast furnace, 267 ; increased tem- 

 perature of, improves economy of 

 blast furnace, 266, 267 ; increased 

 temperature of, causes reduction 

 in temperature of waste blast fur- 

 nace gases, 267. 



Hot-blast stoves, regenerators for, 

 258. 



Huntsman's steel process, 215. 



Hydraulic arrangements in steel- 

 making, 439. 



Hydraulic cylinder of compressed 

 steel, 439. 



IMPURITIES, added to pig iron in 

 blast furnace, 290 (in steel, 211 ; 

 effect of, 338 ; experiments on, 

 difficulties of, 214). 



