Long-wall work.... Doors..... Table I-Comparison 1893 and 1894.. Table II-New mines opened and old ones abandoned... Table III-Improvements made.... Remarks on coal.... Missouri coal field. Pillar and room work. Gas in mines.... Ventilation. Natural ventilation... Furnace ventilation. Fan ventilation.... Safety-catches... Mine maps..... Explosion in Jackson county... Inspection of and report on mines, by counties 18 20 21 26 27 28 29 29 32 34 34 35 35 37 38 72 ......... ..... Table V-Summary of mines, employes, tonnage, by counties. 62 Ray... 119 ....... 63 Sullivan. 128 63 St. Clair.... 126 65 Vernon 129 72 136 |