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41 (XLI) — 1930-1931

Safety Committees, 165.

Safety Conferences, 147, 172, 245, 301, 313, 329, 361.

Safety First Movement, 353.

Safety Proposals, 69.

Safety Thoughts, 28, 171, 198, 208, 212, 226, 250, 262, 278, 281, 294, 306, 324, 344, 358, 374, 375, 390.

Safety-lamps, 78, 224, 269, 300, 333.

Sand Flotation, 24.

Scholarships, Mining, 173, 241, 380.

Screws, Their Uses, 183.

Sealing Off District, 111.

Seams, Reopened, etc., 9, 75, 216, 320, 331, 384, 392.

Secretarial Departments, Colliery, 148, 167.

Self-induction, 23, 34, 151.

Selling Coal Scientifically, 119.

Semi-longwall Advantages, 329.

Sevier, C. A., Institute President, 229.

Shaft Pillars, 232, 398.

Sheffield Mining Dept., Mishap, 64.

Sheffield University Magazine, 25.

Shot-firing, 17, 165, 236, 238.

Shot-firing Accidents, 343.

Shot-firing Batteries, 2, 22.

Shots, Placing, 87.

Silesia Disaster, 4.

Silica Dust Inquiry, 274.

Silicosis, 38, 220.

Sinking Plant, 350.

Siphon, 274.

Small Coal, Reducing, 175.

Smokeless Fuel, 177.

South Africa, Coal, 325.

South Wales Owners' Leaders, 301.

Southern, T. A., Death, 300.

Splitting Air-currents, 381.

Spontaneous Combustion, 40, 93, 165.

State Mines' Output, 171.

Statistics, Coal, 33, 68.

Steam Power, 299.

Steel Industry, Waste Heat, 252.

Steel Props v. Wood, 109, 153.

Stole Fellow-workmen's Wages, 363.

Stone-dusting, 108.

Stothard, Robert, 233.

Stowing Practice, Mechanising, 286.

Strip Coal Mining, 311.

Subsidence, 242, 260, 266.

Successes, 55, 64, 88.

Sulphuretted Hydrogen, 129.

Summary, Coal, 355.

Support of Workings, 53, 71, 88, 234, 247, 260, 266, 277, 306, 313, 321, 338, 358.

Supporting Ground, Methods, 220.

Surveying, 93, 379.

Surveying Boreholes, 159.

Surveying Instruments, Improvements, 183.

Surveying Terms, 223.

Swelling Power of Coal, 203.