654 THE COLLIERY GUARDIAN, March 28, 1913. CONTENTS. PAGE Editorial Article Ignition or Explosion......................... 655 Articles :— The Geology and Pal®ontology of the Warwick- shire Coalfield ............................. 639 Boreholes as a Means of Saving Life ............ 642 Hours of Employment of Winding Enginemen ... 643 “ Ignitions ” and “ Explosions ” ............... 644 Notes from South Wales...................... 645 Official Report of the Lothringen Colliery Explo- sion ___________________________.................................. 646 Mining and Other Notes ...................... 648 Colliery Accidents ........................... 648 Labour and Wages........................... 652 Standard of Ventilation ...................... 657 Book Notices................................ 659 Publications Received ........................ 659 Government Publications .................... 659 Open Contracts ............................. 659 The Freight Market......................... 660 Abstracts of Patent Specifications Recently Accep ted 665 New Patents Connected with the Coal and Iron Trades.................................... 668 Progress Benzol as a Petrol Substitute—The Safety Factor of Winding Ropes—Naphthaline as a Binder for Briquettes ................................ 647 Workmen’s Compensation ........................ 646 ...................... Parliamentary Intelligence .................... 647 .................. Indian and Colonial Notes ..................... 649 .................... Law Intelligence .............................. 649 ............................. Continental Mining Notes .................... 658 .................... Coal, Iron and Engineering Companies .......... 660 ........ Monthly List of Recent Coal Literature ........ 662 ..... The Coal and Iron Trades .......... 650—652, 655, 656 The Tin-plate Trade ......................... 655 The By-Products Trade ...................... 653 The London Coal Trade ...................... 658 .Report of Meeting:— South Wales Institute of Engineers ............ 641 Letters to the Editor :— Trivial Questions ........................... 647 Miscellanea :— Grimsby Coal Exports—Coal Deliveries in Lanca- shire .................................... 641 Institution of Mechanical Engineers—Haulage in Mines : Test Case for Fife Coal Company—Scotch Railways Coal Consumption ................. 642 Application for Restoration of Lapsed Patent under Section 20—Coal Trade Benevolent Associa- tion : Manchester and District Branch........ 642 Astley Green Colliery: Correction............. 647 Hull Coal Exports ........................... 660 North Staffordshire Institute of Mining and Mechanical Engineers ...................... 661 ___________________________________________________ SUBSCRIPTIONS. 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