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51 (LI) — 1940-1941

Cables, 386.

Calculation of Cross-sectional Areas, 22.

Calculations, Gas, 220.

Canada, Motor Types, 202.

Canada's Coal and Coke, 55, 102, 121, 290.

Canada's Coal Story, 202.

Cannels, Nature, 201.

Capping, Type Required, 1.

Carbon Monoxide, 142.

Carbonisation, 161, 163, 276.

Cardiff Division Accidents, 384.

Cardox and Hydrox, 355.

Cars, Safety, in U.S., 136.

Caving, Roof, 231.

Characteristics of Coals, 161.

Charcoal, 153.

Chimney, Height, 232.

Circuit Breakers, 260.

Circuits, Control of, 385.

Classification of Coals, 122.

Classification, Roof, 138.

Clubs for Pit Youths, 80.

Coal Analysis, 146.

Coal Ash, 218.

Coal Cleaning, 367.

Coal Gas, 9.

Coal Tar, 8.

Coal-burning Ship Trials, 41.

Coal-cutter Bits, 243.

Coal-cutters, 349.

Cockshead Seam, 152, 293.

Coefficient of Friction, 93.

Coefficients, 54.

Coke Shrinkage, 295.

Coleford Highdelf Trials, 193.

Colliery A.R.P., 100, 165.

Combustion, Power and, 233.

Competition, Prize, 13, 28, 44, 61, 76, 92, 108, 124, 140, 156, 172, 188, 204, 220, 236, 251, 268, 283, 299, 316, 331, 348, 362, 379, 396.

Competitor, Successful, 36.

Compressed Air, 15, 253.

Condensation of Steam, 216.

Converging Recording Device, 8.

Conveyor, 67, 272, 330.

Correlation of Surveys, 180, 200, 214.

Correspondents, Answers to, 51, 67, 88, 116, 166, 347.

Craftsman, Passing of, 265.

Crane Collapsed, 19.

Creep, Occurrence of, 229.

Cross-measure Drift, 254.

Curves, Calculations, 374.

Cushioned Blasting, 56.

Cylinders, Strength and Weight, 343.