 |
 |
|
 |
|
 |
57 (LVII) — 1946-1947
A.C. Electric Motors, 140.
A.C. Generators, 276.
Abandoned Mines, Plans of, 294.
Abney Level, 110.
Accidents in Mines, 57, 103, 134, 225, 249, 273.
Aerex Fan, 151.
Aeroto Fan, 260.
Agecroft Device, 179.
Air Compressor Receiver Safety Valve, 300.
Air Horse-power, 14, 55, 130.
Air Quantities, 144, 167, 214.
Air Temperature Changes, 106.
Air-crossings, 186, 250.
Air-currents, Drying and Wetting Effects in, 126.
Air-currents, Measurement, 23, 158, 210, 238.
Airways, Resistance of, 172.
Anemometer, 23, 158, 211.
Aneroid Barometer, 97.
Angle, Radian Measure of, 71.
Answers to Correspondents, 7, 20, 55, 70, 77, 79, 86, 91, 93, 105, 111, 127, 137, 149, 187, 188, 209, 231, 237, 243, 280, 291.
Answers to Examination Questions, 2, 14, 25, 38, 54, 61, 73, 85, 98, 112, 124, 138, 152, 158, 171, 200, 207, 221, 231, 258, 270, 285.
Anthracite, 280, 289.
Antipoys Tube Apparatus, 85.
Anti-priming Pipe, 180.
Approaching Old Workings, 55, 172.
Archaean Rocks, 115.
Area of Enclosure, 38, 53.
Area of Roadway in Square Plot, 79.
Areas, Measurement of, 1, 13.
Arresting Runaway-Tub Devices, 179.
Atmospheric Pressure, Measurement, 97, 116.
Azimuth and Quadrant Bearings, 65.
Contains public sector information licensed under the 
