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40 (XL) — 1929-1930

Canada, Coal for, 85.

Canada, Coal Marketing, 395.

Canada, Coke v. Anthracite, 122.

Canada, Mining, Future, 88, 169, 289, 308.

Cap Lamps for Pony Drivers, 214.

Carbon CO2 Cartridge, 412.

Carbon Dioxide, 119.

Carbon Monoxide, 151.

Carbon Monoxide Poisoning, 124.

Carbon Monoxide Testing, 135.

Cavins, Frank, Record, 320.

Cells, Secondary, 186.

Cementation Applied to Mining, 217, 230, 324.

Centrifugal Pumps, 276, 404.

Chains for Lifting, 300, 307.

Chemical Action, 248.

Chemical Formula, 212.

Chlorine, Action on Coal, 43.

Circle, Properties of, 211.

Coal Cargoes, Fires, 213.

Coal Characteristics, 381.

Coal Cleaning, 113, 155, 192, 275, 296, 306, 342, 364, 374, 394.

Coal Dust, 2, 26, 44, 73, 110, 162, 205, 333.

Coal Mines Act, 174.

Coal Preparation, Trend, 69.

Coal Washing Plant, 128.

Coal-cutters, 92, 93, 149, 173.

Cockroaches Invade Workings, 389.

Coke Oven Plant, 23.

Colliery Developments, etc., 89, 91, 165, 185, 240, 315, 336.

Competition, Prize, 13, 28, 44, 60, 76, 92, 108, 124, 141, 156, 173, 188, 204, 220, 236, 253, 268, 284, 300, 317, 333, 349, 365, 381, 397.

Competition, Prize, Awards, 409.

Competitor, Successful, 42.

Compressed Air v. Electricity, 260.

Compressors in Use, 403.

Cone and Pyramid, 150.

Constitution of Coal, 219.

Conveyors, 6, 19, 105, 119, 149, 183, 215.

Cooke, Professor, Death, 58.

Coombs, Colliery Fire, 33.

Correspondence, 12, 37, 53, 87, 112, 121, 139, 251, 273, 359.

Costing of Machine Mining, 247.

Counterbalancing Devices, 207.

Crompton System, 52.

Current, Heating Effects, 235.

Curves, Laying, 31, 190.

Cylinders, Volume of, 135.