Show NATURAL GAS LEAKAGE IN COAL MINES two coal mines in west virginia were recently sampled and analyzed for natural gas leakage apparently due to a natural gas well passing through a barrier pillar gas was found bubbling up through the water which upon examination corre spondee with the natural gas as obtained from the well samples of mine air vitiated by explosives fired in mines were examined and found to contain in some cases harmful amounts of noxious gases samples of natural gas from nevada were examined and in one case found to be exceedingly rich in A sample of natural gas obtained from washington contained 97 per cent nitrogen |