Kibbles, 121.

Kieselguhr, 88.

148.

shafts, 124.

Lippmann's method of sinking, 139.
Liveing's indicator, 487.

Llanbradach Colliery, South Wales, 127,
244, 336.

Llwynypia Colliery, South Wales, 437.
Loading shoots, 525.
Locked coil ropes, 295.
Locking safety lamps, 479.
Locomotives, 281.

Longden, J. A., on shoeing, 241.
shaft pillars, 178, 185.

Longwall method, 178, 194, 210.
Losses in air circulation, 460.
Louis, H., on timber, 162.
Lubricating tubs, 235.
Lührig washers, 536.

Lye Cross Pit, South Staffordshire, 230,
241, 242, 245, 260, 265, 298, 370,
460.

Lyell and Faraday on explosions, 429.

M'CONNEL on coal dust, 432.
Macgeorge, E. F., on boreholes, 34.
Machine drills, hand, 44.

power, 67.

Magneto machines for blasting, 95.
Main and tail rope haulage, 251, 253,

301, 499, 530.

Marihaye Colliery, Belgium, 100.
Market, preparing coal for, 501.
Marsaut lamp, 474.

Marsaut, J. B., on lamps, 470, 478.

Martin, W. H., on laying dust, 437.
Martinet Colliery, Belgium, 302.
Marvin electric rock drill, 73.
Masonry, 124, 131, 170.

Mather and Platt's pumps, 416.

system of boring, 20, 32.
Mathet, L., on working coal, 216.
Mativa on fan tests, 455.
Maypole Colliery, Wigan, 395.
Mechanical stoking, 494.
ventilation, 443.

Meinicke's system of counterbalancing,

324.

Meisoner electric drill, 74.

Melly, E. F., on the Warwickshire coal-
field, 217.

on corrugated roof supports, 169.
Melling's reversing gear, 329.
Menzel, C., on subsidence, 186.

Mermet, A., on carbonic oxide, 428.
Merryweather & Sons' pumps, 415.
Merthyr Vale Colliery, South Wales, 12.
Middlesbrough, boring at, 32.
Miike Colliery, Japan, 398.
Mine fires, 36, 220.

Mitchell's coal cutter, 78.
Moira Colliery, Leicestershire, 219.
Mont Cennis, Westphalia, 100.
Montrambert, France, 185.
Moore, J., on pumping, 410.

Moore's hydraulic pumping plant, 410.
Morgan lamp, 474, 479.

Morgan winding engine, 346.
Mortar, 124.

Mortier fan, 449, 455.
Moss box, 138.
Motors, air, 56.
electric, 57.
Mueseler lamp, 468, 473.
Mulholland's screen, 521.
Multitubular boilers, 491.
Munscheid coal-boring machine, 87.
Murgue, D., on ventilation, 453, 463.
Murton Colliery, Durham, 191.
Musgrave expansion gear, 326.

NAKED lights, 467.

Natural ventilation, 440.

Needles, 44.

Neunkirchen, Prussia, 430, 433.

Poetsch's method of sinking, 141, 148.
Pohle's air lift pump, 419.

Nitro-glycerine, 88.

Nobel Ardeer powder, 109.

carbonite, 109.

"Normal," theory of, 170.
Normanite, 109.

Normanton Colliery, Yorkshire, 62.
Nostell Colliery, Yorkshire, 82.

Nunnery Colliery, Sheffield, 175, 273.
Nuts washer, 536.

EYNHAUSEN's boring tools, 19, 22.
Ohm, 64.

Oil for lamps, 477.
Oiling ropes, 293.

tub axles, 237.

Optimus rock drill, 69.

Orifice of passage, 454.

Ormerod's hook, 351.

Outbursts of gas, 426.

Outcrop, 2.

Overbalancing, 325.

Over-rope haulage, 268, 272.

Overwinding, preventing, 350.

Oxy-hydrogen gas for blasting, 100.

PALMER, H., on loss in ventilation, 451.

Plates and turntables, 229.

211.

Plough steel ropes, 293.

Pottsville, sinking shaft at, 120.
Poussigue on deep winding, 339.
Power machine drills, 67.

Power, transmission of, 36, 46, 57, 248,

bucket, 375.

Bull, 387.

centrifugal, 416.

compressed air, 419.

connecting to rods, 383.
Cornish, 386, 397.
Davey, 387, 391, 411.
direct-acting, 395, 420.
electric, 413.

Evans & Sons, 396, 398, 403.
Hathorn-Davey, 411.

Holst, 402.

Moore, 410, 421.
Piftin rotary, 416.

plunger, 376.
Riedler, 400, 415.
sinking, 390, 403.
Tipton compound, 399.
Worthington, 397.
Pyrites in coal, 220.

QUADRANTS, 385.

Quartering, 116.

Quicksand, sinking through, 104, 116,

140.

RACKAROCK, 89.

Rail guides, 300.

Rails, 224.

Plunger pumps, 376.

Plymouth Colliery, South Wales, 65.
Pneumatic hoisting, 340.

Pochin Colliery, South Wales, 437-

Podmore Hall Colliery, North Stafford-
shire, 101.

shire, 147, 271, 288.

Sawing timber, 500.
Sawyer, A. R., block, 246.

on strength of roof, 154.

Scaffolding in shaft, 126.

Schanschieff's electric lamp, 484.

Schiele fan, 445, 454.

Schladebach, boring at, 33.

Scott & Mountain's electric pumps, 415.
Scrapers, 43.

Screens, 510.

Briart, 511, 519.
Chambers, 513.
combs, 519.

Cox's gyratory, 515.

fixed bar. 510.

Greenwell's, 516.

Guinotte, 519.

gyratory, 515.
jigging, 514.
movable bar, 511.
Mulholland, 521.

plating, 519.
revolving, 515.

spiral, 516.

trommels, 515.

varying size, 518.
vibromotor, 517.

Seaham Colliery, Durham, 135-

Search for coal, 14.

Secondary batteries, 483.

hulage, 238.

ventilation, 452.

Self-acting inclines, 244.

Self-emptying cages, 358, 364.

Semi-portable engines, 244.

Sommeiller's air compressor, 48.
Sopwith, A., on longwall, 195.
Southall, A. B., on guides, 308.
South Staffordshire, method of working,
208, 217.

South Wales, method of working, 200.
Sparking of electro-motors, 64, 81.
Spaulding, H. C., on electric locomo-
tives, 282.

Spear rods, 380.

Speed indicators for fans, 451.
Spencer's corrugated rollers, 247.
Sperenberg, boring at, 32.
Spilling, 160.
Spiral drums, 313.

screens, 516.
Spitzkasten, 534.

Splitting air currents, 457.
Spontaneous combustion, 220, 548.
Sprags, 156.

Sprague, T. W., on electric coal cutters,
62.

Spray producers, 437.
Spring pole, 17.
Spudding, 23.

Spurns, 209.

Square work, 209.
Squibs, 91.

Stables, 241.

Stages for walling, 126.
Stall and pillar, 188.

Stanley's heading machine, 86.
Stauss props, 355, 363.
Steam boilers, 490.

coal, 7.

condensing, 330, 406, 494.
engines, 251, 395, 452.
expansion, 326.

gauge, 492.

jet ventilation, 443.
lifts, 358, 503.

pipes, 249, 443, 492, 499.
pumps, 395.
superheating, 495.

traps, 250.

Steam-ways, boreholes as, 36.
Steavenson, A. L., on fans, 453.

on fire damp indicators, 486.
Steel pit frames, 288.

ropes, 293.
sleepers, 228.

supports, 166.

Stephenson lamp, 468.

Stemming, 43.

Stevens' briquette press, 543.

Stocks or trees, 377.

Stokes, A. H., on coal dust, 434.
lamp, 485.

wick tube, 478.

Stoking, mechanical, 494.
Stone head, 113.
Stoop and room, 188.
Stoppings, 153, 458.
Stops or blocks, 245, 257, 528.

TABLES, revolving, 524.
Tailles chassantes, 124.
montantes, 123.

Tail-rope for winding, 324.

haulage, 251, 253, 279.

Tamping, 43, 98.

plugs, 98.

Taper ropes, 323.

Tapping water, 34.

Taza Malissard fan brake, 247.

Tempering tools, 42, 46.

Temper screw for boring, 22.

Ten-yard seam, S. Staffordshire, 208.
Tenders for boring, 32.
Tension pulleys, 262.
Thermometer, 463.
Thick coal working, 208.

Thomas, J. W., on gas in coal, 10, 432.
Thompson, E., steel bar supports, 167,
169.

Thompson's calorimeter, 9.
Thorneburry lamp, 476.

Threading the rope for haulage, 278.
Throw of faults, 36.

Thunderite, III.

Triger's method of sinking, 140, 148.
Trip expansion gear, 326.
Tripod for drill, 72.
Trommels, 515.
Trough faults, 3.
guides, 307.
washers, 535.
Tubbing, 131.

corrosion of, 136, 442.
cost of, 136.
strength of, 135.
Tub controllers, 370.
Tubs, 230.

attaching to rope, 255, 269.
changing, 316, 337, 358.

circulation of, 174, 361, 370, 502.

keeping on cage, 292.

Turnbull's tippler, 509.

Turntables, 230.

Tyldesley Colliery, Lancashire, 318,