Charles George Warnford Lock.

Economic mining: a practical handbook for the miner, the metallurgist and ... online

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— Pamell process, 554

— Pattinson process, 544

— poQiinff, 550

— prepanng smelting mixture, 539

— puniVing, 542

-^ reTeroeratorr smelting, 528

— Boasler-Rdelmann process, 548

— 8chnahel*s desilyenttng process, 547
-slag, 550

forming, 540

remel&g, 550

— smelting, 528
charges, 542

constitution of slag, 540

cost, 539

flux, 539

fuel, 539

— softening, 542

— sources, 515

— Spanish, 516

— speiss, M9

— Utah, 519

— water-jacket tonaoes, 537

— West process, 554

— Wisconsin, 518

— with nickeliferous pynte, 517

— zinc desilverisation, 545
Lead-zinc ores, treating, 551
Leakage, sur&ce, 80
Lebrbacbite, 588

Levels, 82

Leverage in blasting, 46

Levigating, 187, 230, 309, 818

Lewis-Bartlett lead process, 552

Lewising, 361

Lighting, 65

— cost, 69

— installation, cost, 69
Lignite briquettes, 212
Lime, 261, 326

— furnace for platinum, 587

— in amalgamation, 608

— in lead smelting, 532

— mud cement, 184
Limestone, ferriferous, 497
Limestones, 358

Linings, furnace, 326, 451, 459, 509, 539
Linkenbaoh huddle, 147, 526
Liquid fuel, 225
LiTingstonite, 565
Lixiviating saltpetre, 847, 350
Lixiviation operations, 615

— plant, 615

— nWer, 612

— tanks, 616



Lixiviation troughs, 617
Lodes, see Veins
Long wall working, 99
Longnudd process, 432
Loose gpround, sinking in, 55
Lot pluwphate, 295
Liiderich dressing floors, 643
Liihriff Tanner, 143, 524
Lune<ule turbines, 19

MAGFABLAinB uickcl prooess, 580
Bfaofiulanite, 411
Maggie, 230
Magistral, 605
Magnesia, 326
Mfl^nesite, 310, 826
Magnetic concentration, 149
cost, 502

— firing, 47

— separation, 500

iron from zinc, 643

nickel, 580

Magnetite, 487
Malachite, 415
Maldonite, 408

Maletra cobalt process, 412
Malm, 186
Maltha, 167
Manganese, 556

— imerican, 435, 558

— Australian, 435, 560

— Bosnian) 562

— British, 435. 556

— Caucasian, 435, 557

— Chilian. 435, 559

— commerce, 561

— Cuban, 435, 559

— Dutch, 562

— flux for silver, 610

— fouling mercury, 608

— French, 435, 556

— Ghreekj562

— impunties, 561

— Indian, 435, 557

— Italian, 562

— Japanese, 435, 557

— New Brunswick, 435, 559

— New Zeahmd, 435, 560

— Nova Scotia, 435, 559

— ore, 556

dressing, 561

roasting, 560

treatment, 560

washing. 431, 559

— Portuguese, 562

— Spanish, 435, 557

— statistics, 562

— Swedish, 435, 557

— Turkish, 562

— value, 561

— with silver, 608
Manganite, 556

Mantes copper process, 449



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ECONOMIC MINING.



Marble, 859

Mannatite, 689

ManieilleB deeilTeriaing pioooflB, 544

Matte, lead, 550

— f)ot8,462

— roasting, 487

— smelting oopper, 442
Melaoonite, 415
Meronrr, 568

— aUuTial, 565

— American, 563, 564

— applioationa, 571

— Austrian, 563

— Borneo, 568

— Canoadan,568

— condensing, 567, 570

— consumption, 568

— cost, 565

of calcining, 567, 569

— fines, 569

— foaled by manganese, 608

— geology, 563

— Italian, 568

— Mexican, 568, 565

— New South Wales, 565

— ore, 568

calcining, 565

treatment, 563, 565

— PeruTian, 563

— production, 563

— Queensland, 565

— Russian, 563

— Servian, 563

— soot, 569

— Spanish, 568

— yalue, 571

— with bitumen, 564

— yield, 564
Meres, 383
Metacinnabarite, 563
Metallic paints, 311
Metals, igneous sources, 2
Metasomatic interchange, 2
Mexican shaft furnace, 442

— silver process, 611
Mica, 265
MiUerite, 412, 572
Milling faces, durability, 132
Mills, 83

Millstones, 870
Mine, laying out, 12

— surveying, 12

— timbers, decay, 564
preserving, 102

— waters, copper from, 140
Mineral decomposition, 2

— indications, I

— veins, origin, 1

— wax, 289
Mining, 81

— a:ibe8tos, 168

— cost, 89

— iron ore, 491



Mining salt, 842

— slate, 367

— stone, 860

— sulphur, 874, 875

— talc. 886
Mispickel, 156
Moffet furnace, 552
Mond nickel process, 581
Moser frnmaoe, 647

Mother lode of Oallfomia, 478
Motive power, 15
Mount Morgan gold, 465
Mulattos, ^1
Multiplied crushers, 122
Mundic, 322. 487
Mnschelkalk, 516, 689
Musoovite, 265
Mussels, pearl, 269

Naphtha residues in taaoa

447
Nassau phosphate, 295
Natural gas, 273
Naumannite, 558
Neate's griuder, 130
NegriUos,591
Nevada timbering, 86
Niccolite, 572
Nickel, 572

— American, 581

— and copper, separating, 578

— Canadian, 573, 581

— chocolat, 575

— oonmieroe, 581

— Oomisb, 572

— cost, 578

— geology, 572

— German, 572

— magnetic separotiDn, 580

— matte, bessraaerising, 578
refining, 578

— metallic, cost, 582

— mining, 574, 575

— New Caledonian, 574, 581

— Norwegian, 572, 581

— ore, 572

calcining, 576

cost, 576

treatment, 576

— oxide, co«t, 582

— production, 581

— Scotch, 572

— smelting, 223, 577

— Swedish, 572, 581

— uses, 582

— value, 582

— with lead, 517

— with silver, 610

— yield, 572
Niobium in tin, 684
Nitro-compounds, 43
Noumeaite, 572



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INDEX.



663



00HBE8,310

O'Hura fbrnaoe, 440
Oil engines, 22

— pipe lines, 287
Oilstones, 371
Okoni(e,291
Opal, 245
Optimns drill, 89
Oiange stones, 871

Ore, anrifenms, sampliug, 7

— base, sampling, 8

— bodies, developing, 10

following faulted, 2

origin, 1

persistence, 2, 3

sampling, 5

— breakers, 121

— driers, 613

— hoisting, 509

— separating impurities from, 133
Oxford nickel smelting, 580
Orpiment, 156

Dsmiridimn, 485

Dsmitim, 5^

[Herhead stoping, 83

^rerwinding, 109

[)xland calciner, 157, 432, 439, 646

[)yster8, pearl, 269

[)zokerit, 289

pAcoe, 591

Paint from copper-ore residues, 462

iron slog, 513

— mineral, 310
Palladium, 583

- gold, 586

- removing from platinum, 586
'andermite, 174, 177

'an amalgamation, 607
-scale, $10

- tailings, smelting, 609
*ape-Henneberg concentration, 150
'arkes process, 546

'amell lead-zinc process, 554

'atio process, 604, 613

'attinson desilTerising process, 544

'each, 682

*earce furnace, 440

*earLi,269

»eat,271

'(Mlrisco iron ore, 489

'eltoD wheel, 21

'entlandite, 572

'ercussiYe arilling, 33

'eridotts, 583

etroleum, 273

- geology, 273

- production, 289

- storing, 288

- transporting, 287

- well sinking, 278
hosphates, 292
'bosphatio manures, 513



Phosphoric acid from slag, 513

Phosphorite, 296

Piauzite, 167

Picotite,409

Pigments, 309

Pillar and stall working, 99

Pile burning coke, 215

— masting, 431, 436, 531

— roasting niclral oie, 576
Pilz f^imaoe, 537

Pipe lines, 287
Pipes, corrosion, 80
Pitchblende, 638
Placer mining, 480 i

Platiniridium, 485
Platinum, 583

— alloys, 583

— American, 585

— Australian, 586

— Borneo, 586

— Brazilian, 586

— British Columbian, 585

— Califomian, 581

— Canadian, 583

— Columbian, 585

— commerce, 587

— concentrating, 586

— cost of mining, 585

— in ffhicial drift, 585

— hyobaulicing, 585

— New South Wales, 583

— New Zealand, 586

— pure, cost, 587

— purifying, 586

— qualities, 587

— Uussian, 583, 581

— sources, 583

— treatment, 586

— uses, 587

— viilue, 587

— with gold, 585

— yield, 585
Plug, tamping, 46
Plumbago, 249
Pneumatic powe^, 29

— pulverisers, 131
Pointed boxes, 139
Polyhallite, 319
Porpezite, 586
Potash nitrate, 349

— salts. 319
Potassium, 619

— cost, 619. 621
Powders, 43
Power, motive, 15
Priccite, 174
Producer gas, 225
Props, 101
Prospecting, 1, 239
Proustite, 590
Psilomelone, 556
Pulveriidng iron ore, 504

— slag. 513



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ECONOMIC MINING.



PulvenBing talo, 885

— 9tt Grinding
Pomioe, 821
Pumping, 71

— brine, 884

— by oil engine, 24

— oo8t,75

— electric, 26, 79

— plants, 78
Pumps, 72

— bnne, 885

— Chinese, 625

— sinking, 51

Pyramidal troughs, 189, 420
Pyrites, cupreous, 419
Pyritic smelting, 444
Pyrargyrite, 590

Pyrrhotite, niokeliferous, 572, 573, 574

cost, 581

dressing, 576

Pyritic smelting, 611
Pyrite,487
Pyrites, 822

— cinders, 497

— in coal, 195
Pyrolusite, 556
Pyromorphite, 515

QUABRTINO, 97

— slate, 867
Qoioksilver, m0 Meioury

Baqstonxb, 871
Bain splitting slate, 869
Raise, 88

Baschette ftimace, 587 I

Bealgar, 156
Ked shag calcining, 507
Beducing, <ee Grinding
Befractoiy materials, 82G
BeefiB, 9M Veins
Beiohardite, 819
Beel8,108

Betorts, clay for, 649
Beverberatories, 814, 816, 482, 487, 489,
447, 542, 528, 646

— American, 585
Beverberatory, antimony, 406

• BcYolying furnaces, 439
Bhodium, 588

— gold, 586

— removing from platinum, 586
Bhodonite, 557

Bibbon quartz, 478
Big, well boring, 280, 345
Biolite, 588
Bio Tinto pyrites, 419
Bittingerjig, 138
Bobey winding engine, 107
Bobe/s stamp§, 483
Bock breakers, 121

— filling, 90

— oil, 273



Book salt, 883

Bolls, 125

Bopes, 107

Bopeways, rudimentary, 575 [518

Boosler-Edelmann lead purifying prooen,

Bubio iron ore, 489

Buby, 246

— silver, 590
Bussell process, 613

cost, 617

Butheninm, 583

Saddle reefiB, 471, 520
Safety commutator, 29

— lamps, 65
Salinas, 846
Salines, 175
Salnatron, 258
Saltpetres, 346
Salt, 838

— boiling, 839

— consumption in ohloridising roast, 603

— pans, 840



Salzburg tables, 524
Samples, auriferous, testing, 7
Sampling base ores, 8

— copper, 463

— ore Dodies, 5
Sandstones, 358
Sapphire, 247
Sassolite, 174, 177

Sauter-HarM magnetic separattn*, 645
Schnabel's desUverising process, 547 '
Schonite, 319

Sobram drills, 4, 39
Schranz crusher, 122

— fine crusher, 130

— tables, 523
Scheelite, 636
Scheelitine, 636

Scotch ore hearth, 407, 533
Screening coal, 201, 209

— iron ores, 498

— lead ores, 523
Screens, 132
Scribing mica, 266
Seams, 2

Searohing for minerals, 1
Selenium, 588

— minerals, 588

— preparation, 581
Selen-sulphur, 588
Senarmontite, 399
Separating, 133
Separators, 420
Sergeant coal-cutter, 198

— drills, 37
Serpenton, 529

Settle's water cartridge, 49
SetUers,605
Seyasel asphalt, 167
Shaft sinkini;, 51



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INDEX.



66s



ShakiDg tables, 143
Shelf fdrnaoQB, 489
Shoots, 2
Shiites,83
Siderite, 487
Siegenite, 412, 572
Siemens drflls, 36

— exploders, 48

— iron, 509

Siemens-Martin iron, 509
Siemas, 310

Silver, 590

— aHudgamation, 601
co«t,606

— American, 595, 618

— Arp;entine, 618

— An2ona,595

— Augostine process, 613

— Austndian, 590, 618

— Austrian, 618

— barrel amalgamation, 603

— BoliTian, 590, 618

— Boss process, 608

— British, 618

— California, 595

— Canadian, 618

— Cazo process, 604

— Central American, 618

— ChiUan, 618

— ohloridising, 603

— Columbian, 618

— Colorado, 597

— commerce, 618

— ooncentrating in copper, 609

— cost of producing, 618

— Endlioh process, 610

— fondo process, 604

— Francke's tina process, 607

— Freiberg process, 603

— French, 618

— furnaces, 612

— geology, 590

— Uerman, 618

— Honduras, 593

— hypo, 613

— Idaho, 598

— in igneous rocks, 2

— in lead, 521

— Italian, 618

— Japanese, 618

— Kiss process, 613

— Lake Superior, 598

— liquating, 611

— lixi7iation,612
cost, 617

— manganese flux, 610

— Mexican, 618 .
process, 611

— Montana, 599

— Nevada, 600

— Norwegian, 618

— ores, 590

concentration, 607



Silver ores, heap roastinf?, 611

— pan amalgamation, 607

— patio process, 604

— Peruvian, 594, 618

— production, 618

— Russell process, 613

— Bussian, 618

— salt consumption in ohloridising, 549

— smelting, 609

at great elevations, 611

pan tailings, 609

— Spanish, 618

— Swedish, 618

— tellurides with, 608

— treatment, 601

— Utah, 601

— volatilisation, 603, 608, 612

— Yon Patera process, 613

— wet extraction, 612

— with cobalt, 610

— with manganese, 608

— with nickel, 610

— with tin, 592, 607, 631

— with zinc, 641

— Ziervo^l process, 613
Silesian zinc process, 648
Simonite, 487
Sinking, 51

— pumps, 76

— salt wells, 334
Sinks, 352
Sinopel, 473
Siphons, 71

Sizing in jigging, 137
Skips, 72, 109
Slack briquettes, 212
Sli^, iron, 513

— lead, producing, 540, 550

— pot8,462

— utilising heat of, 549
Slate, 364

— cutting, 369

— names of sizes, 370

— output, 370

— picking, 203, 204

— splitting, 369

— weight, 370
Slating, lap, 370

— measuring, 370
Slime frame, 147

— treating, 522
Smaltine, 411
Smalts, 314

Smelting antimonv, 402, 406

— at great elevations, 611

— copper, 436

— garnierite, 579

— iron, 508

— lead, 528

— nickel ore, 577

— pyritic, 611

— silver, 609
Smithsonite 639



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ECONOMIC MINING.



Smoke, 227
Soakestone, 371
Soapstone, 384
Soda, 352

— nitrate, 346
Sodiocapmus hypo. 613
Sodinm, 619

— ooBt, 619. 621

— uses, 621

Stift ore body, working on, 91
Softening lead, 542
Sorting iron orAg, 499
Sparry iron, 487
Spathic ore, 487
Specific grayitiee, 133
Specular ore, 487
Sperrylite, 583
Sphalerite, 639
Spitzk&sten, 139
Spitzlutten, 142
Splitting slate, 369

— mica, 266
Square seta, 86
Squib veins, 468
Stull8,84
Stamps, 126

— for gold onartz, 484

— replaced oy amstras, 482

— steam, 430

— tin, 632
Stangen-spath, 309
Stannite, 622

StahPs oobalt process, 412
StaU roasting, 438
Stassfurtite, 174

Steam extraction of sulphur, 381
-^ pumps, 72

— stamps, 127, 430
Steatite, 384
Stein vanner, 145
Stepbanite, 590
Stetefeldt furnace, 602, 612
Stewart's smelter, 445
Stibnite, 899

Stickney's copper process, 456
Stone, 357

— grindstones, 371

— millstone, 370

— mining, 860

— whetstones, 371
Stoping, 83

Storing petroleum, 288

Stream tin, 622

Stripping, 97

Stucco, 253

Sudbury nickel, 573 i

Sulphur, 328, 373

— American, 375

— cost, 375

— calcarelle, 376

— calcarone, 376

— dissolving, 381

— doppione, 380



Sulphur extraction, 375, 376

— Galician, 375

— geological origin, 373

— Icelandic, 375

— Italian, 23

— Japanese, 375

— mining, 874, 375

— production, 374

— removal from iron, 507

— roasting, 376

— Sicilian, 873

— steam extraction, 881
Sulphuric acid, 822
Sump, 88

Sun evaporation, 840, 345, 350
Sur&oe leaka^ 80
Surveys, underground, 12

— transferring surface alignments to un-
derground workings, 12

Swansea reverberatory smelting fumaoefi

447
Sylvin, 819

Taohtdbitb, 319
Taking samples, 5
Talc, 384

— American, 384

— Ghineee, 386

— cost, 385, 386

— cutting, 386

— fibrous, 384, 885

— Indian, 385

— mining, 386

— production, 385

— pulverising, 885
Tamping, 46

Tanks, lixiviation, 616
TkntaUte,634
Tantalum in tin, 634
Tapping furnaces, 452, 578

— wastes, 40

Tar in furnace pipes, 613
Taylor gas producers, 612, 646
Teleras, 431

Tellurldee with silver, 608
Temperature in mines, 59
Tephioite. 557
Terraris furnace, 647
Testing auriferous samples, 7
Tetrahedrite, 415, 592
Thallium, 595
Thermal units, 225
Thiosulphates, 613
Thomas Gilchrist iron, 509
Tierras,569
Tifl^SOO
Timbering, 84

— square set, 86
Timbers, decay, 564

— preserving, 102
Tin, 622

— African, 631

— American, 630, 634



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INDEX.



667



no. AiutimliikQ, 628, 634
-Banca,6i6, 634
-Billit(m,626,«84
-BoUFiaii,631,634
-BritiBh,622, 634

- Bnrniese, 623

- calcining, 682

- Gliineee treatment, 633.
-oommeroe, 634

- dreadng, 631



- hydiaulicing, 626

- imparities, 634

- in igneoofl rooks, 2
-lDdmn,623

- leavings, 633
-Malacca, 634

- Mexican, 631

- mining, 624

- Mt Bischoff, 627
-urea, 622

removing tungsten, 686

- Penang, 634

- prodootion, 634

- Singapore, 634

- smiting charges, 635
-Spanish, 623
-stamps, 632

- Straits, 623, 634
-stream, 622

- Somatra, 627

- Tasmanian, 627, 634

- treatment, 631
-uses, 634

- valuation, 634

- with sUver, 592, 607, 631

- yields, 624
Tina, 605
rinkal,174

Tipplers, US, 109, 110, 111
Pitanium in tin, 634
Topaz. 248
Torpedoes, 286
rorta8.604
Transportation, cost, 492

- nickel ore, 575
Transporting iron ore, 491
rrinidad asphalt, 169
Trogerite, 638
Troughs, lixiviation, 617
Tunnels, 81

Tunf^rtates, soluble, producing, 636

- British, 636

- iu tin, 634
-ores, 686

- removing from tin ore, 636

- treating, 636

- U8es,68i6
rurbines»16
Purkey oilstone, 371
rurquoise, 248
Punet furnace^ 440
Pzu-chien, 855



UlNTAHITE, 167

Uintite, 167
Ulexite, 174
Umbers, 317
Underground hauling, 104

— transferring surface alignments, 12
Underhand stoping, 84
Unwatering mines, 71

Ural platinum, 583
Uramum, 638

— ores, 688
Uranmica, 638
Uranocalcite, 638

Yal db Travbrs asphalt, 167
Vtduing lead ores, 541
Ysmadium with copper, 417
Vanners, 148
Veins, origin, 1
Vena dulce iron ore, 489
Ventilation, 59
Volatilisation, silver, 612

— zinc, 649

Von Patera process, 613
Vortex turbhies, 18

Wad, 559

— cobaltiferous, 411
Wagons, 108

Wall rocks, 8
Washing coal, 200

— phosphates, 300, 302
Washita stones, 371
Wastes, tapping, 40
Water of Ayr stone, 371

— channels, 16

— ejectors, 71

— gas, 226

— motors, 16

— pipes, 16

— power, 15

caloulatiuK h.p., 22

— tapping by long drill, 40
Wat^jaoketed cartridges, 49
Water-jacket furnaces, 445, 537
Wax, mineral, 289

Wedges, 50

Wells, petroleum, 278

— salt, 334

— sinkine, 51, 278, 334
Welsh-Belgian zinc furnace, 649
Wenstrom magnetic separator, 501
West lead-zinc process, 554
Westphalite, 16

Wet ground, sinking through, 51
Whetstones, 371
Whin, auriferous, 473
WiUemite, 639
Winding, 105

— drums, 108
Winning, 81
Winze, 83



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ECONOMIC MINING.



Wire ropes, 107

— ropewaya, 118, 491

radunentaiy, 575

Wires, electric, fixing, 80

— joints, 49

Wood lined pipes, 80
Wolfram, 636

— furnace, ^
Wolongonzite, 167
Working fSnoes, ventilating, 62
Workings, transferring snrfiEtce

ments to, 12
Worthington pnmps, 75
Wrinkle, 157, 636
Wnrtzilite, 167



align-



Zaffbb, 314
Zierrogel process, 613
Zinc, 639

— affinity for iron, 650

— Amencan, 640, 650

— applications, 651

— Austrian, 650

— Belgian, 650

— British, 639, 650, 686

— commerce, 650

— direct production in blast furnace, 650

— distillation, 647

— electrolysis, 555

— electrolytic, 650



Zinc for desOyerising lead, 545

— French, 639, 650

— ftime, precipitating, 647, 648

— geology, 639

— Ctorman, 639, 650

— Indian, 640

— lead ores, treating, 551

Pamell prooeta. 554

West process, 554

— ore dressmg, 643
treatment, 642

— ores, 639

impurities, 651

roaisting, 645, 646

Talnation, 651

— oxide pigment, 552

— Polish, 650

— production, 650

— retorts, 649

f separating iron, 648

— Silesian, 650

— smelting, cost, 650

— Spanish, 640, 950

— Swedish, 640

— Talue, 651

— volatilising, 551, 649

— with copper, 641

— with silver, 641
Zincite, 639
Zorgite,588



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ECONOMIC MINING.



WORTHINGTON
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153 Queen Victoria Street^ London^ E.C.



Worthington Pumps

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Secognised Standard

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Worthington Pumps

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every service connected

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Quotations for suitable

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will be sent on

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Particulars of Service.

New Style Sinking Pump.



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Offices-12 aXTEEN ANNE'S GATE, LONDON, S.W.

21 OBAINQEB STREET WEST, NEWCASTLE-ON-TYVS.

261 WEST OEOEGE STBEET, GLASOOW.

54 MARKET STBEET, MELBOURNE.
Works— WOOLWICH, KENT.



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ECONOMIC MINING.



EASTON, ANDERSON ft GOOLDEN,

LIMITED,

HEAD OFFICE: 3 WHITEHALL PLACE, 8.W.

CARDIFF OFFICE: BANK BUILDINGS, ST. MARY STREET.

WORKS: ERITH, KENT.



ELECTRIC ELECTRIC

AND AND

HYDRAULIC HYDRAULIC

LIFTS. CRANES.

CONTINUOUS ROPE HAULING MACHINERY.
Saving effected nearly 60 per cent, per annum on first cost, as

QUOTED BY R. ROBERTSON. ESQ.. MICE.. IN HIS PaPER READ BEFORE

Institute of Civil Engineers. 5th March, 1895.

Mining Machinery.

fJYDRAULIC RAMS. ENGINES.

^""'"^ BOILERS

MACHINERY. BOILERS.

WATERWORKS. DYNAMOS.

GRAFTON HIGH SPEED ENGINE WITH PUMP AND MOTOR.



EASTON, Anderson & Goolden,

LIMITED.

HYDRAULIC, ELECTRIC, MARINE, GENERAL ENGINEERS,
MILLWRIGHTS, BOILER MAKERS, IRON AND BRASS FOUNDERS.

Telegrams: •'EGYPTIAN, LONDON." Telephone, 3695.

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ECONOMIC MINING.






JOHN DAYIS & SON,

Electric Light and Power Engineers,
all saints' works,

DERBY.

118 NEWQATE ST., LONDOIT. 6 BUTE OBESOEKT, OABDIFF.

Aad 13 HOSELET STBEET, NEWOASTLE-OK-TTHE.



DiTi* and Stokes' Patent Safety Safety Commutator

Kotor (Commutator closed). . open for oleaninc

Interior and bruh«

SPECIALITIES :

ELECTRIC COAL CUTTINQ & DRILLINO.
Sole Importers of the Jeffrey Coal Mining Machines.
ELECTRIC PUMPING.

ELECTRIC HAULAGE & HOISTING.
ELECTRIC LIGHTING.
ELECTRIC BLASTING (High and Low Tension).
ELECTRIC SIGNALS, TELEPHONES, &c.
ELECTRIC SAFETY MINING MOTOR.

(DAVIS AND STOKES- PATENT).

Expert Electrical Engineers sent to advise and take particolaes.
List of Contracts executed and Testimonialt upon application.



HANITFACTXJBEBS OF

MINERS' SAFETY LAMPS, MINING AND SURVEYING INSTRUMENTS

AND APPARATU§„,,,,,Google



ECONOMIC MINING.



T^HE Works of this Company are the most extensive of their kind in the United States,
and were established at Trenton, New Jersey, in 1849. I^s products have maintained
heir high standard of excellence from the first, and among the g^reat eng^ineering^ feats
ccomplished by this Company are:— The Suspension Bridge at Niagara Palls, the first
•f any magnitude and consequence to be built anywhere ; those at Cincinnati. Ohio and
Mttsburgh, Pa. ; and the Largest Suspension Bridge in the World, spanning the East
iiver between New York and Brooklyn.

The ^Vire Ropes manufactured at these Works are the standard throughout the many
nining fields of the United States for lifting and hauling plants.

The greater part of the extensive street tramway companies of the United States are
iupplied ^»ith Cables made by this Company, w^hose machinery is capabie of making
•ables in one piece weighing 75 tons.

The capacity of these Works for Electric Wire and Cables of all kinds is second to
)one in the world.

Conversations by telephone between people over xooo miles apart are now of daily
Kcurrence through the medium of Copper Wire made by this Company and a person at
Boston can vAth ease talk to one in Chicago over a ^re which weighs but 435 lbs. per
mile, and is only 0*165'' in diameter.

A large part of the Copper Wire for the new Submarine Atlantic Cable now being
made by Siemens Bros., Limited, of London, for the Commercial Cable Co., was manu-
factured by John A. Roebling's Sons Company.

Many of the electric street railways of the United States are supplied with the
Roebling Insulated and Bare Copper Wire. These Works turn out annually large
quantities of Lead-encased Cables for telephone and light services, and also Electrical
Wire of every variety.



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ECONOMIC MINING.



Air Compressors.



STEAM ACTUATED, OR DRIVEN BY BELT, OEAR,
OR ELECTRICALLY.



PISTON INLET COLD AIB COMPBESSOB, WITH
WATES-JACEETED CTUNDER & HSADS.



13
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The INGERSOLL-SERGEANT DRILL Co.

(A. E. W. GWYN, Agent for Europe),

114^ QUEEN VICTORIA STREET, LONDON, EX.

-3 ..rior^alp



ECONOMIC MINING.



Online LibraryCharles George Warnford LockEconomic mining: a practical handbook for the miner, the metallurgist and ... → online text (page 75 of 76)