Show Coal Miners S Scientists Unite to Solve Problems 1 PiTTSBURG April 12 Pine coal dust and moist air quickly Increase the hazards of spontaneous combustion combustion combustion com com- bustion according to scientists of ot the Carnegie Institute of ot Technology Technology ogy oSY ami the Pittsburg station of Qt the United States bureau of ot mines who wo have been carrying on investigations investigations In es here with an advisory board of qt coal operators and mining min mIn- ing engineers Another conclusion set forth Is that mixing freshly mined coal with old coal oal does doe not develop any anymore anymore more moro 1 heat than that derived from coal piled separately A third conclusion Is la that most of ot the alloys allos available for use In coal conI mIne equipment are corroded corrod d extensively by the tho acid waters in mines mine Bras Brasses es containing zinc c rapidly while bronzes containing tin corrode more slowly Cupro Cupro nickel nickel and silver nickel-silver al alloys alloys alloys al- al loys have about the same resisting p power to the tho acids as the brasses Tl Them eso reports mark the first milestone in n the serious efforts of oft oftie t tie coal mining Industry to stabilize stabilize ize mining in cooperation with an educational Institution |