January 24, 1913 THE COLLIERY GUARDIAN. 207 Demy Octavo, 176 pages, Cloth. 45 Original Photographs and Diagrams. Price 6s. 3d. (post free). Miners’ Nystagmus: ITS CAUSES AND PREVENTION, By T. LISTER LLEWELLYN, M.D., B.S.(Lond.), &c., &c. With a Preface hy Professor J. S. HALDANE, F.R.S., M.D., And a Legal Appendix by DOUGLAS KNOCKER, M.B. (Loud.), M.R.C.S., L.R.C.P., D.P.H., BarristeraMaw. CONTENTS. Introduction — Description of the Eye — Anatomy: Physiology. Chapter 1.—General Description of the Disease. Chapter 2.—Frequency and Resulting' Incapacity. Chapter 3.—Historical Account of the Disease and Theories of its Causation. Chapters 4, 5 and 6.—Conditions Determining the Occurrence of Nystagmus. Chapter 7.—Diagnosis and Prognosis. Chapter 8.—The Etiology of Nystagmus. Chapter 9.—Preventive Measures and Treatment. Chapter 10.—Summary and Conclusions. With Appendices : Legal Information—Glossary —References and Bibliography— The Effects of Deficiency of Oxygen on the Light of a Safety Lamp—Test of Ceag Lamp. THE COLLIERY GUARDIAN COMPANY LIMITED, 30 & 31, Furnival Street, Holborn, London, E.C. Purchasers’ Guide to Advertisers’ Specialities—(continued). Forges Alldays A Onions Pneumatic Engineering Co. Ld., Birmingham Hardy Patent Pick Co. Ld., Sheffield Forcings Bagnall, W. G., Ld., Stafford Chorley Bailway Wagon Co. Ld., Chorley Hardy Patent Pick Co. Ld., Sheffield Lowmoor Co. Ld., Lowmoor Ironworks, Bradford Benton ,B. M., and Co., Midland Works, Sheffield Uskside Engineering Co. Ld.# Newport Walker Bros. (Wigan) Ld., Wigan Wright, Joseph, and Co., Tipton Yorkshire Engine Co. Ld. Sheffield riotion Clutches Beyer, Dorling, and Co. Ld., Bradford, Yorks. Bridge, David, A Co. Ld., Castleton, Manchester Daglish, Bobert, and Co. Ld., St. Helens, Lancs. Fraser A Chalmers Ld., 3, London Wall Bldgs., E.C. Longbotham, B. H., and Co. Ld., Wakefield Norton’s (Tividale) Ld., Tipton Beavell and Co. Ld., Ipswich Beddaway, F„ A Co. Ld., Pendleton, Manchester Theedam, E. C„ Ld., Dudley Walker Brothers (Wigan) Ld., Wigan Wood, John, A Sons Ld., Brook Foundry, Wigan Wright, Joseph, and Co., Tipton Friction Surfaces Frood, Herbert, to. Ld,, Chapel-en-le-Frith Fuel Economisers Fell, U. A., Dronfield, near Sheffield Pillatt and Co.. Stapleford, Nottingham Stringer, John, and Son, Dept. 11, Blackburn Yorkshire Boiler Co. Ld. Bradford Fuel Machinery Middleton, Bobert, Sheepscar Foundry, Leeds Uskside Engineering Co. Ld., Newport Yeadon, Son and Co., Albion-place, Leeds Furnaces Alldays & Onions Pneumatic Engineering Co. Ld., Birmingham Bennis, Ecu, and Co. Ld., Little Hulton, Bolton Leech. Goodall A Co., Hunslet, Leeds Pillatt and Co. Ld., Stapleford, Nottingham Furnace Ironwork Alldays A Onions Pneumatic Engineering Co. Ld., Birmingham Heenan A Froude Ld., Worcester and Manchester Leech, Goodall A Co., Hunslet Leeds Wood, John, and Sons Ld., Wigan Fuse Igniters Fuses (Safety) Cotton Powder Co. Ld.,32, Queen Victoria-st., E.C. Curtis’s and Harvey Ld., Cannon-st. House, E.C. Davis, John, and Son (Derby) Ld., Derby Electric Blasting Apparatus Co. Ld., Cinderford Nobel’s Explosives Co. Ld., Glasgow Ganister Bricks Gas Compressors Beiliss and Morcom Ld,, Birmingham Gas Engines British O vygen Co.Ld., Elveiton-st., Westminster Glover, M., and Co., Holbeck-lane. Leeds Bailway and General Engineering Co. Ld., Notts Bobey and Co. Ld., Lincoln Tangyes Ld., Cornwall Works, Birmingham Gas Exhausters Alldays A Onions Pneumatic Engineering Co. Ld., Birmingham Koppers’ (The) Coke Oven and Bye-Product Co., Sheffield Gas Plant Koppers’ (The) Coke Oven and Bye-Product Co., Sheffield Mather and Platt Ld., Manchester I E.C. Gas Producers Gas-Testing Lamps Ackroyd and Best Ld., Morley, Leeds Davis, John, and Son (Derby) Ld., Derby Gas Tubes and Fittings Lewis, Edwin, and Sons, Wolverhampton Stewarts & Lloyds Ld., Birmingham A Glasgow Wellington Tube Works Ld., Great Bridge, Tipton Gas Valves Haslam and Schontheil Ld., Bristol Gauge Glasses Davis, E., 2, Aire-street, Leeds Davis, John, and Son (Derby) Ld., Derby Guilbert-Martin, 9, Edinund-pl„ Aldersgate, E.C. Hopkinson, J., and Co. Ld., Huddersfield Boyles Ld., Irlam, Manchester Theedam, E. C., Ld„ Dudley Treasure, J. B., & Co., 8 & 12, Vauxhall-rd., L’pool Gauge Glass Protectors Davis, E., 2, Aire-street, Leeds Hopkinson, J., and Co. Ld., Huddersfield Boyles Ld., Irlam, Manchester Theedam, E. C., Ld., Dudley Gauges Davis, E., 2, Aire-street, Leeds Green and Boulding Ld., 28, New Bridge-st., Hopkinson, J., and Co. Ld., Huddersfield Yorkshire Boiler Co. Ld., Bradford Cear (Special for Motor Lorries Cars &o.) Brown, David, A Sons (Hudd.) Ld., Huddersfield Gearing British Insulated and Helsby Cables Ld., Prescot Brown, David, & Sons (Hudd.) Ld., Huddersfield Bumsted and Chandler Ld., Hednesford, Staffs. Citroen, Andre, and Co., 27, Queen Victoria Street Daglish, Robert, and Co. Ld., St. Helens, Lancs. Jardine, John, Deering-street, Nottingham Lancaster and Tonge Ld., Pendleton, Manchester Leech, Goodall & Co., Hunslet, Leeds Thornewill and Warham Ld., Burton-on-Trent Walker Brothers (Wigan) Ld., Wigan Wood, John, and Son Ld., Brook Foundry, Wigan Girders (Iron and Steel) Daglish, Bobt., and Co. Ld., St. Helens, Lancs. Firth, Wm., Ld., Water-lane, Leeds Heenar and Froude Ld., Manchester Henderson and Glass, Liverpool Isca Foundry Co., Newport, Mon. Benton, B. M., and Co., Midland Works, Sheffield Scott, Walter, Ld., Leeds Steel Works, Leeds Shelton Iron, Steel and Coal Co. Ld., Stoke-on- Trent, Staffs. Wal’d, Thos. W.. Limited, Albion Works, Sheffield Glass Manufacturers (Tube Rods Enamels) Guilbert-Martin, 9. Edmund-pl., Aldersgate, E.C. Governors (Engine) Evans, Joseph, and Sons (Wolverhampton) Ld., W olverhampton Mather and Platt Ld., Manchester Daglish, Bobt., and Co. Ld., St. Helens, Lancs. Tangyes Ld., Cornwall Works, Birmingham Governors (Hydraulic) Grease Chorley Bailway Wagon Co. Ld., Ohorley, Lancs. Gaunt and Hickman, Wolverhampton Trier Bros., Caxton House, Westminster Theedam, E. C., Ld., Dudley Thomas and Bishop, 119-125, Finsbury Pav., E.C. Wakefield, C. C., and Co., 27, Cannon-street, E.C. Grinding Maohinery Bridge, David, & Co. Ld., Castleton, Manchester Hardy Patent Pick Co. Ld., Sheffield Grindstones Gunpowder Curtis’s and Harvey Ld., Cannon st. House, E.C. Gutta Percha Cort, Arthur, A Co. 803$, Camberwell-rd., London Harness Hauling Drums Bever, Dorling and Co. Ld., Bradford Bridge, David, A Co. Ld., Castleton, Manchester Bumsted and Chandler Ld., Hednesford. Staffs. Daglish, Bobert, and Co. Ld., St. Helens, Lancs. Lowmoor Co. Ld., Lowmoor Ironworks, Bradford Heenan A Froude Ld., Worcester and Manchester Norton’s (Tividale) Ld.. Tipton Leech, Goodall A Co., Hunslet, Leeds Phillips, C. D., Newport, Mon. Bobey and Co. Ld;, Lincoln Spencer and Co. Ld., Melksham, Wilts Sutcliffe, B., Horbury, near Wakefield Thornewill and Warham Ld., Burton-on-Trent Walker Bros. (Wigan) Ld., Wigan Wood, John, A Sons Ld., Brook Foundry, Wigan Wootton Bros. Ld., Coalville, Leicester Wright, Joseph, and Co., Tipton Youngs, Byland-street Works, Birmingham Headgears Daglish, Bobt., and Co. Ld., St. Helens, Lancs. Heenan A Froude Ld., Worcester and Manchester Leech, Goodall A Co., Hunslet, Leeds Norton’s (Tividale) Ld., Tipton Bobey and Co. Ld., Lincoln Spencer and Co. Ld., Melksham, Wilts Wright, Joseph, and Co., Tipton Heading Machines Davis, John, and Son (Derby) Ld., Derby Hardy Patent Pick Co. Ld., Sheffield International Channelling Machines Ld., Sheffield HEAP8TEAD8 Coulson, M., A Co. Ld., Spennymoor, Co. Durham Hardy Patent Pick Co. Ld., Sheffield Head, Wrightson and Co. Ld., Stockton-on-Tees Heenan and Froude Ld.. Worcester Leech, Goodall A Co., Hunslet. Leeds Longbotham, B. H., and Co. Ld., Wakefield Norton’s (Tividale) Ld., Tipton Plowright Bros. La., Chesterfield Spencer and Co. Ld., Melksham, Wilts Tickle Brothers, Vulcan Ironworks, Wigan Walker Bros. (Wigan) Ld., Wigan Wood, John, A Sons Ld.. Brook Foundry, Wigan Wright, Joseph, and Co., Tipton Yorkshire Hennebique Contracting Co. Ld., Leec s H0I8T8 Alldays A Onions Pneumatic Engineering Co. Ld. Birmingham Bleicherb’s Aer.al Transporters Ld., 99-100, Pal merston House, Bishopsgate-street, 60, E.C. Daglish, Bobert, and Co. Ld., St. Helene, Lancs. Fraser A Chalmers Ld., 3, London Wall Bldgs., E.C. Hardy Patent Pick Co. Ld., Sheffield Heenan and Froude Ld., Worcester Leech, Goodall A Co., Hunslet, Leeds Mather and Platt Ld., Manchester Mavor and Coulson Ld., 47, Broad-street, Glasgow Beavell and Co. Ld., Ipswich Spencer and Co. Ld., Melksham, Wilts Wood, John A Sons Ld., Brook Foundry, Wigan Wright, Joseph, and Co., Tipton Youngs, Byland-street Works, Birmingham Hooks or Links (Safety) Heenan and Froude Ld., Worcester Humble, Stephen, 9, Victoria-street, S.W. Lowmoor Co. Ld., Lowmoor Ironworks, Bradford Ormerod, Edward, Atherton, near Manchester Walker, Thos., and Son Ld., Birmingham Wood, John, A Sons Ld., Brook Foundry, Wigan Wright, Joseph, and Co., Tipton, Staffs. Hoppers Baker, John, and Son, Bilston, Staffs Coulson, M„ and Co. Ld., Spennymoor Harvey, G. A., A Co., Woolwich-rd., London, S.E Hardy Patent Pick Co. Ld., Sheffield Heenan and Froude Ld., Worcester Leech, Goodall A Co., Hunslet, Leeds Hoppers—continued Simon-Carves Ld.. 20. Mount-street, Manchester Spencer and Co. Ld., Melksham, Wilts Theedam, E. C., Ld., Dudley Wright, Joseph, and Co., Tipton Yorkshire Hennebique Contracting Co. Ld., Leeds Hose Cort, Arthur, A Co., 303$, Camberwell-rd., London Hardy Patent Pick Co. Ld., Sheffield Mining Engineering Go. Ld., Sheffield Northern Bubber Co., The Wicker, Sheffield Norton’s (Tividale) Ld., Tipton Beddaway, F., A Co. Ld., Pendleton, Manchester Willcox. W. H.. A Co. Ld., 23, Southwark-st., S.E. Hose (Coal-Cutter) Northern Bubber Co., Tee Wicker, Sheffield Humidifiers m , Heenan A Froude Ld., Worcester and Manchester Mather and Platt Ld., Manchester Hydro Electric Plants Hydraulic Maohinery t , Daglish, Bobert, and Co. Ld., St. Helens, Lancs, Hathorn, Davey and Co. Ld., Leeds Leech, Goodall A Co., Hunslet, Leeds Mather and Platt Ld., Manchester Middleton, Bobert, Sheepscar Foundry, Leeds Pearn, Frank, A Co., Ld., West Gorton, Manchester Pulsometer Engineering Co. Ld., Beading Tangyes Ld., Cornwall Works, Birmingham Wood, John, A Sons Ld., Brook Foundry, Wigan Youngs, Byland-street Works, Birmingham Hydraulic Reduoing Valves Auld, D., and Sons, Whitevale Foundry, Glasgow Hygrometers Davis, John, and Son (Derby) Ld., Derby Incline Rollers Bagnall, W. 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