CONTENTS. Letter of transmittal....................................................... 7 Summary..................................................................... 9 The reason why.............................................................. !2 Geology..................................................................... 14 History..................................................................... 15 Early developments..................................................... !5 Mining methods......................................................... !6 Statistics of coal production............................................... !7 Present mining conditions under Scranton.................................... 18 Pine Brook colliery.................................................... !9 Mount Pleasant colliery................................................ 21 Capouse colliery....................................................... 22 West Ridge colliery.................................................... 23 Richmond No. 3 colliery................................................ 24 National colliery...................................................... 25 Dodge colliery......................................................... 26 Hampton colliery....................................................... 26 Bellevue colliery...................................................... 27 Central colliery....................................................... 28 Hyde Park colliery and Continental colliery............................ 29 Diamond colliery....................................................... 30 Brisbin colliery....................................................... 34 Cayuga colliery and Storrs colliery.................................... 32 Oxford colliery........................................................ 33 Von S torch colliery................................................... 35 Leggetts Creek colliery................................................ 36 Marvine colliery....................................................... 37 Dickson colliery....................................................... 33 Man ville colliery..................................................... 39 Pennsylvania colliery.................................................. 40 Green Ridge colliery................................................... 44 North End colliery..................................................... 42 Clearview colliery..................................................... 43 Bull’s Head colliery................................................... 43 Mountain Lake colliery................................................. 43 Observations on present mining conditions under Scranton.................... 44 Introductory statement................................................. 44 Surface beds........................................................... 44 West side of Lackawanna River...................................... 44 Central part of Scranton........................................... 45 Middle beds, Hyde Park and Providence sections............................. 49 Dunmore beds........................................................... 50 Recapitulation......................................................... 50 Methods for surface support................................................. 51 Natural or pillar support.............................................. 51 1