36 CHARLES GRIFFIN & CO:S PUBLICATIONS. 



COAL-MINING (A Text-Book of) 



FOR THE USE OF COLLIERY MANAGERS AND OTHERS 

 ENGAGED IN COAL-MINING. 



HERBERT WILLIAM HUGHES, F.G.S., 



Assoc. Royal School of Mines, Certificated Colliery Manager. 



In Demy Svo, Handsome Cloth. With very Numerous Illustrations, mostly 

 reduced from Working Drawings. i8j. 



GENERAL CONTENTS. 



Geology : Rocks P'aults Order of Succession Carboniferous System in Britain. 

 Coal : Definition and Formation of Coal Classification and Commercial Value of Coals. 

 Search for Coal : Boring various appliances used Devices employed to meet Difficulties 

 of deep Boring Special methods of Boring Mather & Platt's, American, and Diamond 

 systems Accidents in Boring Cost of Boring Use of Boreholes. Breaking Ground; 

 Tools Transmission of Power : Compressed Air, Electricity Power Machine Drills Coal 

 Cutting by Machinery Cost of Coal Cutting Explosives Blasting in Dry and Dusty 

 Mines Blasting by Electricity Various methods to supersede Blasting. Sinking: 

 Position, Form, and Size of shaft Operation of getting down to " Stone-head" Method of 

 proceeding afterward-^-Lining shafts Keeping out Water by Tubbing Cost of Tubbing 

 Sinking by Boring -Kind - Chaudron, and Lipmann methods Sinking through Quicksands 

 Cost of Sinking. Preliminary Operations : Driving underground Roads Supporting 

 Roof: Timbering, Chocks or Cogs, Iron and Steel Supports and Masonry Arrangement of 

 Inset. Methods of Working : Shaft, Pillar, and Subsidence Bord and Pillar System- 

 Lancashire Method Longwall Method Double Stall Method Working Steep Seams 

 Working Thick Seams Working Seams lying near together Spontaneous Combustion. 

 Haulage: Rails Tubs Haulage by Horses Self-acting Inclines Direct-acting Haulage 

 Main and Tail Rope Endless Chain- Endless Rope Comparison. Winding; Pit 

 Frames Pulleys Cages Ropes Guides Engines Drums Brakes Counterbalancing 

 Expansion Condensation Compound Engines Prevention of Overwinding Catches at pit 

 top Changing Tubs Tub Controllers Signalling. Pumping: Bucket and Plunger 

 Pumps Supporting Pipes in Shaft Valves Suspended lifts for Sinking Cornish and 

 Bull Engines Davey Differential Engine Worthington Pump Calculations as to size of 

 Pumps Draining Deep Workings Dams. Ventilation: Quantity of air required 

 Gases met with in Mines Coal-dust Laws of Friction Production of Air-currents 

 Natural Ventilation Furnace Ventilation Mechanical Ventilators Efficiency of Fans 

 Comparison of Furnaces and Fans Distribution of the Air-current Measurement of Air- 

 currents. Lighting: Naked Lights Safety Lamps Modern Lamps Conclusions 

 Locking and Cleaning Lamps Electric Light Underground Delicate Indicators. Works 

 at Surface; Boilers Mechanical Stoking Coal Conveyors Workshops. Preparation 

 of Coal for Market: General Considerations Tipplers Screens Varying the Sizes made 

 by Screens Belts Revolving Tables Loading Shoots Typical Illustrations of the arrange- 

 ment of Various Screening Establishments Coal Washing Dry Coal Cleaning Briquettes. 



V* A Novel and Important Feature will be found in the BIBLIOGRAPHY given at the end 

 of each Chapter. 



" A Text-book on Coal-Mining is a great desideratum, and Mr. HUGHES possesses 

 ADMIRABLE QUALIFICATIONS for supplying it. . . . We cordially recommend the work." 

 Colliery Guardian. 



LONDON : EXETER STREET, STRAND. 



