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50 (L) — 1939-1940
Backstays in Mines, 215, 230.
Barometers and Thermometers, 29.
Barriers, Safety, 255, 272.
Batteries, Storage, 252.
Beam Engine, Working, 4.
Beat Diseases, 19.
Blasting with Permissible Explosives, 84.
Board for Mining Examinations, 229, 299.
Boiler Defects, 246.
Boiler Details, 399.
Boiler Furnaces, 174.
Boiler Plant, Coal, 32.
Boilers, Lancashire, 77, 93.
Boilers, Water Tube, 110.
Book Notices, 133, 170.
Books for Students, 390.
Boreholes, 94.
Boring, 390.
Boys' Clubs, 343.
Boys, Training, 5, 236.
Brake Wheels, 318.
Braking, Emergency, 410.
Brick Arching, Replacing, 310.
Brigade (Fire) Competition, 19.
Broken Workings, 178.
Bump in Staffs. Mine, 139.
Bursters, Picks, Glimmers, 356.
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