Show Collieries Under the Sea At Cape llrelon thiro uro Immiuss nllcrles bilng worked under the ocean Theso subiuurlno mints cover i thousand ncres unil an) In lug In irtusul stcBtlll) Thu nines are in lend at tho shore nnl the operators follow tho vein biueuth th water for moro than n milt It might bo ex pectcil that tho wtlght of the water Uj would forco Its way Into the mlno I I ho bed of tho ocean Is us tight as fl it cinunt cistern A soil of tin clay B lines tho submarlno roof of tho mine fi nnd the sediment abovu Is hi Id In B llaco nnd packed down by tho wnttr B pressure until there Is not a crtvlcu In nor a drop ot water from oteihiuil |