Imes silver-mine, Iron Hill, Leadville, Colorado, 151 to 164 passim.
Improved French Pocket-Compass (Bergier) [xxi], 97.

Independence township, Allegany County, N. Y., oil-wells, 295.

Indiana: Coal-production in 1887-88, 124, 132, 133.

Indian Territory: Coal of, 653; Coal-production in 1887-88, 124.

Influence of Silicon on the Determination of Phosphorus in Iron (DROWN) [xxi], 90.
International metric standards, 716.

Iowa: Coal-production in 1887–88, 124.

Irma gold-mine, Montgomery County, Maryland, 401, 403.
Irma stamp-mill, Montgomery County, Maryland, 401, 404.

Iron: Action of, upon aluminum, 833; Alloyed with aluminum, analyses and tests,
557, et seq.; Effect of aluminum on cast-iron, 102 et seq.; on wrought-iron and
steel. 557, 835, et seq., 857; Effect of carbon on strength of, 115; Effect of
phosphorus on cast-iron, 458 et seq.; Phosphorus-determination in, influenced
by silicon, 90 et seq., 709; by arsenic and titannium, 714; by various methods,
705; Puddling, heat consumed in, 613; Record of pig-metal in blowing-in
Durham furnace, 380 et seq.; Small output of, at Brooke furnace, Birdsboro,
Pa., 427, et seq.

Iron fault at Iron Hill, Leadville, Colorado, 149, 150, 153.

Iron Hill, Leadville, Colorado: Geology and ore-deposits of, 145, et seq.
Iron Hill Consolidated silver-mine, Leadville, Colorado, 145 to 163 passim.
Iron King iron-mine, Gunnison County, Colorado, 271.

Iron Mask silver-mine, Red Cliff, Eagle County [172].
Iron-mines: UNITED STATES: Colorado: Chaffee County, Calumet, 269, 270; Fre-
mont County, Grape Creek, 270; Gunnison County, Cumberland, 272; Iron
King, 271; Lake County, Leadville, Breece, 270; Hull, 270, 271; Saguache
County, Hot Springs, 270; Michigan and Wisconsin: Menominee range, Chapin
[426]; Ludington [426]; New Jersey: Passaic County, Ringwood, Peters, 627;
New York: Clinton County, Chateaugay Ore and Iron Company's, 748; Co-
lumbia County, Hudson River Ore and Iron Company's, 252; Mt. Tom, 253,
254; Essex County, Crown Point, 748; Lover's Hole, 753; Miller, 751; New
Bed, 751, 752, 754; Old Bed, 750; Port Henry, 747, 748, 749; OTHER COUN-
TRIES: England: Normanton, St. John's 422; Nova Scotia: Loch Lomond
[202]; Onslow [202]; Tenny Cape [202]; Sweden: Dannemora, 634.
Iron-ores: Analyses (see also Analyses of Iron-Ores), 201, 202, 203, 309, 311, 759,
762; Desulphurization of pyritiferous iron-ores, 78 et seq.; Distribution of
phosphorus in Hudson River carbonates, 252; LOCALITIES: Colorado:
Boulder County, 266, 267; New York: Essex County, Port Henry (magnetic),
747; Nova Scotia, 199, 202; Transvaal (Africa), 347; Production of, in Lake
Champlain district, 747.

Iron-Resources of Colorado (CHAUVENET) [xxi], 266.
Iron-Silver Mining Conpany, Iron Hill, Leadville, Colo., 146 to 176 passim.
Iron-works: Maine: Piscataquis County, Katahdin Iron Works, 304; Massachu-

setts Bristol County, Fall River Iron Works [214]; New Jersey: Sussex
County, Stanhope, Musconetcong [86]; Warren County, Oxford Iron and Nail
Company [214, 215]; Pennsylvania: Berks County, Birdsboro, Brook E. & G.),
427; Bucks County. Riegelsville, Durham, 379; Cameron County, Emporium,
Cameron, 434; Chester County, Phoenixville, Phoenix, 88.

Irving, Johnston & Co's asbestos-mine, Thetford, Quebec, Canada, 326.
IVES, JAMES T. B., Occurrences of Copper- Glance, North of Lake Huron, with Notes on
the Structure of the Locality [xx], 72.

JACOBUS, D. S., remarks in discussion of Mr. Keep's paper on Aluminum and Other
Metals Compared, 834.

Jeffrey asbestos-mine, Danville, Quebec, Canada, 327.

Jellico cannel coal-mine, Campbell County, Tenn., 438.

Jigging (see, also, Concentration, Ore-Dressing, Hartz Jig): Speed of, modifies Rit-
tinger's formulæ, 647, 648; Speed, ore bedding and water used in, 261.
JONES, CLEMENS, Phosphorus in Pig-Iron, Steel and Iron-Ore [xlvii], 705.
Jones, William R., Biographical notice of, 621.
Julien electrical accumulator, 349, 357 et seq.

Kamloops coal-mines, British Columbia, 315.
Kansas, coal-production of, in 1887-88, 124.

Kaolin Analysis of, 406; In Ouray County, Colo., 141.

Katahdin iron-works, Piscataquis County, Maine, ore-roasters, 304.

KEEP, W.J.: Aluminum and Other Metals Compared [xlvi], 798; Aluminum in
Cast-Iron [xxi], 102; Aluminum in Wrought-Iron and Steel-Castings [xlvi],
835; Phosphorus in Cast-Iron [xxv], 458.

"Keep's Test" [108], 460, 798, 813, 816.

Kentucky: Asphaltic sand of [578, 582]; Cannel coal of, 436; Coal-production
of, in 1887-88, 124.

Kerl on tin-assaying, 11, 15.

Keystone blast furnaces, Birdsboro, Pa., 427.

Kilns (see also Ore-roasters); Fired with gas, 880; Gjers [78]; Westman, 304.
King Brothers' asbestos-mine, Thetford, Quebec, Canada, 326.

Kings County, Nova Scotia, bog iron-ore [200].

Knoxville silver-mine, Tombstone, Ariz., 910.
Korea, gold-mining and milling, 363.

Lady Alice silver-mine, Iron Hill, Leadville, Colorado, 167.
Lake Champlain, N. Y., iron-district, production, 747.

Lake City mining-district, San Juan County, Colorado, [140].
Lake County, Colorado: Iron-resources, 270.

LANGLEY, JOHN W., see HUNT, ALFRED E.

La Rica gold-mine, U. S. of Colombia, S. A., 211.

Law, (see Mining Law) United States mining, 182, 881.

Leaching silver-sulphate (Ziervogel process) 67.

Lead: Alloys, physical tests of, 820; Antimony and, for electrical accumulators, 350;
Early use of, in Colorado smelting-practice, 56, 57; Objections to, in matte,
65; Physical tests of, 818; Test-cylinders of, for experiments with explosives,
517.

Lead-fumes, Bag-process for collecting, 674.

Lead-furnaces (see also Furnaces and Smelting): Capacity of 60; Missouri, Jasper
County, Lone Elm Works, 674.

Lead-mines: Missouri; Jasper County; Joplin, Birch Diggings [677]; Swindle Dig-
gings [676]; Temple Diggings [686]; Lower Joplin Valley Diggings [676];
Oronogo [676]; Stevens' Diggings [676]; Newton County; Granby, Eastpoint
[676]; Holman's Diggings, Granby [676, 677]; Trent Diggings [676]; Vil-
lage Diggings [676].

Lead-ores: Analysis, 173, 676, 677; Concentration of, at the Desloge Lead Co.'s
old mill, Bonne Terre, Mo., 263; LOCALITIES: Colorado, Ouray County, Red
Mountain, 140 et seq.; Nova Scotia, 203; Transvaal (Africa) 347.

Lead-smelting products, Analyses, 685 to 695 passim.

Leadville, Colorado: Geology and ore-deposits of Iron Hill, 145 et seq.; Concentra-
tion-practice at, 262.

Lead-works: Missouri, St. Francois County, Bonne Terre, Desloge, 263; St. Joseph

[263].

LECKIE, R. G., Remarks in discussion of Mr. Ells's paper on The Mining Industries
of Quebec, 333.

Ledebur on decomposition of pyrite by heat, 80.

Lehigh coal-mine, Choctaw coal-field, Indian Territory, 657.

Lehigh mining-region, Miners' strike of 1888 [128].

LESLEY, J. P., Biographical Notice of Charles A. Ashburner [xxx] 365.

Levol's method of tin-assay, 28.

Lewis and Bartlett Bag-Process of Collecting Lead-Fumes at the Lone Elm Works,
Joplin, Missouri (DEWEY) [xlvii] 674.

Libano gold-mines, U.S. of Colombia, S. A., 211.

Lignite: (see also coal) Analysis, 314, 315.

Lime, exceptionally pure, from eastern Quebec, 329.

Lime silver-mine, Iron Hill, Leadville, Colorado, 162, 163, 164.

Limestone: Asphaltic, 579; Canada, Eastern Quebec, 317, 329; Nova Scotia, 202.
Linkenbach slime-buddle, 257, 259.

List of Commercial Phosphates (ADAMS) [xxvi] 649.

Little Annie gold-mine, Rio Grande County, Colorado, 448.

Little Daisy silver-mine, Iron Hill, Leadville, Colorado, 165.

Tesa

Little Stray Horse gulch, Leadville, Colorado, 146.

Loch Lomond iron-mine, Nova Scotia [202].

Lode, mining-claim; rights of owner of, 881.

London silver-lead-mine, Park County, Colorado [262].

Lone Elm Furnace, analysis of smelting products, 685 to 695 passim.

Losses: By avalanches, 583; In ore-concentration at Leadville, Colorado, 262; In
vanning tellurides, 441, 446; Of gold, in chloridizing [600]; Of heat, in gasi-
fying coal, 615, 859; Of silver, in slimes, 250, 251; Of silver, in milling,
250 et seq.

Louisville silver-nine, Iron Hill, Leadville, Colorado, 146 to 172 passim, 450.
Lover's Hole iron-mine, Essex County, N. Y., 753.

Ludington iron-mine, Menominee range, compressed-air plant at, 426.

Lynch gold-mine, Montgomery County, Md., 404.

MACFARLANE, GRAHAM: Notes on American Cannel Coal [xlvii] 436.

Magnetite: Crystalline, in the Port Henry mines, N. Y., 747; Crystals of, and
analyses, 759.

Main gold-mine, Gilpin County, Colo., 452.

Malpaso gold-mine, U. S. of Colombia, S. A., 210.

Malthite classified among hydrocarbons [582].

Manganese, its bleaching effect on copper, 495.

Manganese-bronze for propellers, 485.

Manganese-ores: In Nova Scotia, 199, 200, 202; Treatment of argentiferous, 910.

Manufacture of Open-Hearth Bridge-Steel (SHED) [xxi] 88.

Marshall Basin mining-district, San Juan County, Colo. [140].

Marsh-gas classified among hydrocarbons [582].

Maryland, coal-production of, in 1887-88, 124, 130.

Maryland gold-mine, Montgomery County, Md., 399.
Maryland, Montgomery County, gold-deposits in, 39.
VOL. XVIII.-59

Matte: Analyses and treatment of, at Argo, Colo., 64 to 69 passim.; Bessemerizing
of [70]; Nickle-copper matte produced at Sudbury, Ontario, 281.

Mayberry coal-bed, Choctaw coal-field, Indian Territory, 660.
McAlester coal-bed, Choctaw coal-field, Indian Territory, 657, 659.

MCDOWELL, F. H.: Stripping Ore-Deposits [xxxi] 627.

McKeon silver-mine, Iron Hill, Leadville, Colo., 152 to 159 passim, 167.
Measure and weight, U. S. prototype standards of, 716 et seq.

Mechanical equivalent of electricity, 353, 354.

Mechanical properties (see tests).

Medicine Hat coal-mine, Manitoba, 314.

Melting-point of silicates, 740, 744 et seq.

MENDENHALL, T. C.: The United States Prototype Standards of Weight and Meas

ure [xxxi] 716.

Menges, Dr. Franklin, ou desulphurization of iron-ores, 78, 80.

Mercury in the Transvaal, Africa, 347.

MERRITT, WM. HAMILTON: Notes on Some Coal in Western Canada [xxv], 313.
Metallurgical progress in the West, 55 et seq.

Metallurgy (see Smelting).

Metals, physical tests of various, 803, 817 et seq.

Metric international standards, 716.

Michigan, coal-production of, in 1887-88, 124, 132.

Microscopic examinations of gold-quartz, 639.

Mikado silver-mine, Iron Hill, Leadville, Colo., 146, 152, 167 footnote, 176.

Mike fault, Iron Hill, Leadville, Colo., 150.

Mike silver-mine, Iron Hill, Leadville, Colo., 165, 172.

Miller iron-mine, Essex County, N. Y., 751.

:

Milling Gold- and silver-ores at Combination Company's mill, Deer Lodge
County, Montana, itemized record, 249, 251; Gold-ores in Korea, 363.
Milo silver-mine, Ten Mile, Summit County, Colo. [172].

Mine car wheels, friction of, 508 et seq.

Mineral Deposits of Nova Scotia, 198.

Mineral Point mining-district, San Juan County, Colo. [140].
Miners' wages in the United States in 1888 [122], 135 et seq.

Mines (see under the different Metals and Minerals).

Mining (see also Coal-Mining): As affected by avalanches, 583; By stripping at
Peter's Iron-mine, Ringwood, N. J., 627 et seq.; at Bertha zinc-mine, Bertha,
Va., 632 et seq.; at Dannemora, Sweden, 634 et seq.; at Stobie nickel-mine, Sud-
bury, Ontario, 280; at Tilly Foster mine, Putnam County, N. Y. [627]; Of
fine gold sands in Idaho, 597 et seq.

Mining-claims, rights of owners of, 881.

Mining Industries of Eastern Quebec (ELLS) [xxv], 316.

Mining law, 182, 881, et seq.

Minnie silver-mine, Iron Hill, Leadville, Colorado, 146 to 176 passim.

Missouri, coal-production in, 1887-88, 124.

Mitchell coal-basin, Indian Territory, 654 to 660 passim.

Mitchell's method of assaying tin-ores containing silica, 39, 40, 41.

Mitchell's method of tin-assay, 18.

Mitis wrought-iron castings, composition and properties of, 557, 838 et seq., 857.

Moffet hearth-furnace for lead, 679.

Molly Gibson silver-mine, Aspen, Col. [262].

Montana, coal-production in, 1887-88, 124.

Montgomery County, Maryland, Gold-deposits in, 391.

Montgomery gold-mines, Great Falls, Maryland, 399.

Moore, Charles J., Remarks in discussion of Mr. Armitage's paper on Concentration

of Low-Grade Ores, 262.

Morning Star silver-mine, Leadville, Colorado [169].

Moulton Mining Company, Butte City, Montana [225].

Moyer fault, Iron Hill, Leadville, Colorado, 149, 150, 151.

Moyer placer-mine, Iron Hill, Leadville, Colorado, 151 to 173 passim.

Mt. Tom iron-mine, Burden Station, N. Y., 253, 254.

Mt. Sneffles mining-district, San Juan County, Colorado [140].
Mules, wire-rope, and electrical haulage compared, 412, 418.
Musconetcong Iron-Works, Stanhope, Sussex County, N. J. [86].

Naphtha classified among hydrocarbons [582].

National Bell silver-mine, Red Mountain district, Colorado, 141, 142.

Natural gas: Analysis of, 881; Classified among hydrocarbons [582]; Consumption
of, in Pittsburgh, 131; Effect of, on coal-trade, 132; In New York, 294; Rela-
tion between petroleum and, 291.

Natural-Gas Explorations in the Eastern-Ontario Peninsula (ASHBURNER) [xxv],

290.

Nebraska, coal-production in, 1887-88, 124.

Nevill's gold-mine, Angel's Camp, Calaveras County, Cal. [643].

New Bed iron-mines, Essex County, N. Y., 751, 752, 754.

NEWBERRY, W. E., Notes on the Geology of the Aspen Mining-District [xx], 273.
New Caledonian nickel-mines [289].

New England, coal-production in 1887-88, 124.

New Granada: Resources of, 205.

New Mexico, coal-production in 1887-88, 124.

New Rockland slate-quarry, Melbourne, Quebec, 328.

Newton-Ulster silver-mine, Iron Hill, Leadville, Col., 167.

New York: Natural gas, 294; Petroleum, 294.

Nichols copper-mine, Quebec, 318.

Nickel: Annual production of, 289; Its bleaching effect on copper, 494; Occurrence
of, in Canada, 279 et seq.; in Transvaal, Africa [347].

Nickel-mines: Canada: Ontario, Sudbury, Copper Cliff, 281 et seq.; Evans, 280,

283; Stobie, 280, 289; New Caledonia [289].

Nicola coal-mine, British Columbia, 315.

Nigger Hill tin-mine, Lawrence County, South Dakota [4].

Nitroglycerine, comparative tests of, 515.

NORRIS, R. VAN A.,Note on the Friction of Mine-Car Wheels [xlviii], 508.

North Carolina, coal-production of, in 1887-88, 124.

Northern coal-field (bituminous), Michigan [123], 124.

Note on Gold-Mining and Milling in Korea (PIERCE) [xlvii], 363.

Note on the Friction of Mine-Car Wheels (NORRIS) [xlviii], 508.

Note on the Use of Aluminum in the Construction of Instruments of Precision (BLAKE)
[xxxi], 503.

Notes on American Cannel Coal (MACFARLANE) [xlvii], 436.

Notes on Fuel Gas (GOETZ) [xlv i], 609.

Notes on Some Coals in Western Canada (MERRITT) [xxv], 313.

Notes on Additional Diaphragm in the Howell Roasting-Furnace (GOODALE) [xxi],