INDEX TO VOLUME I. 



491 



Ifl ![ Dlll.IXO. 



mstrong, Krupp, Schneider and 

 Whitwdi-tli, l.V) ; temperature in, 

 practical limit cf, iisl ; visible 

 .i[i|>. malice of flame in, depending 

 On U-inpfratuiv. :M ; Woolwich 

 Arsenal type of, I .">.". l.'ii'i. 



lenitive gas puddling funiace, 

 ~1 1 1 ; advantages of, detailed, 

 L'lS; applications of, 252, 309; 

 auxiliary heating chamber for, 

 i 1 1 ^ : bed of, with water bridges, 

 248 ; best iron from, 251 ; cost 

 of, 254 ; criticisms on, reply to, 

 -'."I. -'>'>; description of, 244, 



246 ; flame in, command of tem- 

 perature and quality of, 247, 383 ; 

 gas and air regulating valves in, 



247 ; heat not wasted in, 254 ; 

 heats increased in number with, 

 2.">i>; improvement of iron in, to 

 what due, 255 ; and ordinary 

 puddling furnace, tables of com- 

 parison of, 249, 250 ; power of, 

 tested with inferior pig metal, 



'< ; puddler's labour reduc'.'d in, 

 252 ; rabble applied to, 2~>'2 ; 

 saving of fuel in, 251 ; water 

 bridges in, consumption of fuel 

 saved by, 252 ; workmen well 

 disposed to, 254 ; yield of puddled 

 bar, exceeds charge of pig metal 

 into, 251. 



Regenerative open hearth ore pro- 

 cess, 233 ; apparatus for, present 

 form of, 233 ; charging in, manner 

 of, 234 ; experiments over several 

 years with, 233 ; Grand Prix at 

 French Exhibition for, 233 ; 

 heated gas forced among ore in, 

 234 ; qualities of ore for, 235 ; 

 reduction of ore into sponge and 

 dissolution in bath in, 234 ; ores 

 used in, steel dependent on, 235 ; 

 testing of metal in, 235. 



Regenerative open hearth steel pro- 

 cess, 217, 389 ; Attwood's experi- 

 ments, 217, 388 ; bauxite used in, 



217, 218, 388; Boiguc, Rambour 

 and Co. 'a experiments at Mont- 

 lucon with, 217 ; bottom repair ..f 

 in, 389 ; charging materials, 231, 

 389 ; experiments on, at Birming- 

 ham Sample Steel Works, 218, 388 ; 

 experiments with, incomplete, 233; 

 high temperature in, method of 

 maintaining, 231; ferro- manganese 

 used in, 391 ; Le Chatelier's expe- 

 riments on, 217, 388; Martin's, 218, 



388 ; Martin's, French Exhibition 

 gold medal awarded to produce by, 



218, 388 ; ores charged in, 389 ; 

 rail metal by, 390 ; reagents em- 

 ployed in, 233 ; running metal from 

 blast furnace in, 332, 333 ; sand 

 used in, 218 ; spiegeleisen added in, 

 _:52, 284 ; steel of special quality 

 by, 391 ; tapping furnace in, 231, 



389 ; testing samples from metallic 

 bath in, 232, 284 ; time available 

 for chemical reaction in, 232 ; time 

 required to melt charge in, 232, 390. 



Regenerators, action of, 224, 383 ; air, 

 224, 382 ; bricks for, arrangement 

 and size of, 228; brickwork actually 

 required in, calculation of quantity 

 of, 227 ; chambers of loose fire- 

 bricks, 224, 246, 382 ; cooling of, 

 224, 383 ; current in, advantages of 

 regular reversal of, 224, 225, 247 ; 

 detailed description of action in, 

 247,383; gas, 224, 382; experiments 

 by Siemens, C. \V., on, reference to, 

 228 ; how heated, 224, 383 ; heated 

 from above downwards, 228 ; hot 

 gas supplied to, produces hot 

 chimney, 386 ; opposite currents 

 passing through, should have equal 

 capacity for heat, 259 ; placed 

 below heating chamber, 228 ; re- 

 versing valves in, action of, 246, 

 247, 383 ; temperature of, 224, 

 383 ; temperature constant in, 

 225 ; temperature range in, 386 ; 

 vertical, advantages of, 228 ; waste 



