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58 (LVIII) — 1947-1948

Calculation and Plotting of Triangulation, 162.

Calorie, 47.

Cannock Chase Coalfield, 193.

Carbon Dioxide, 46, 311.

Carbon Monoxide, 58, 311.

Carbon Monoxide Detector, 297.

Cardox Shell, 158.

Ceag-Montlucon Firedamp Detector, 39.

Centigrade Heat Unit, 47.

Centrifugal Clutch, 95.

Centrifugal Pumps, 62, 160, 173.

Claw Cluteh, 95.

Clutches, 95.

Coal Face Lighting Panel, 259.

Coal in Heap, 262.

Coal Plough, 124, 265.

Coal Seams, Alteration to, due to Igneous Intrusions, 87.

Coal Seams, Identification and Correlation, 1, 13, 29.

Coal Utilisation Joint Council, 306.

Coal Washing, Recent Developments, 90.

Coalburster, 309.

Coal-cutters, 25, 45, 102, 109, 196, 301.

Coalfields of Britain, 100, 113, 121, 137, 146, 161, 169, 185, 193, 206.

Coalfields of Midlothian Basin, 169.

Competition, Prize, 9, 20, 32, 45, 57, 69, 80, 93, 105, 117, 129, 140, 153, 165, 177, 189, 201, 213, 225, 236, 249, 261, 273, 285, 297, 309.

Competition, Prize, Awards, 302.

Competitor, Successful, 37.

Complete Electrical Circuits, 19.

Composition of Normal Air, 33.

Compressed Air Drill, 238.

Condensation of Steam, 94, 106.

Contents of Enclosure, 23.

Contour Maps, Uses of, 50, 66.

Contouring with Tacheometer, 43.

Contouring, Methods of, 17, 26, 43.

Conveyor Belt, Speed of, 274.

Conveyor Driving Unit, 211, 286.

Conveyors, 74, 88, 97, 175, 180, 211, 220, 234, 244, 286, 298.

Cornish and Corliss Valves, 202.

Cornish Engines Preservation Society, 132.

Correlation by Weisbach Triangulation, 219.

Correlation Computations, 241.

Cross-measure Drift, 260, 285.

Cuckoo Shot, 245.

Cumberland Coalfield, 206.

Current in A.C. Circuits, 209, 217, 230.