Document zoJqon7m3kNp6ze6M9jLwjO8R

Confidential Approved. n...N0V9 1950 MELLON INSTITUTE OF INDUSTRIAL 9 DEPARTMENT OF RESEARCH IN CHEMICAL PHY&pJHs DfVISiCn Fellow____ Project _____ Mr. J. P. Morgan | RecU NOV 1 0 Fellowship No.--.----259 j dy............. R:f. Ni Dust Analysis: Pittsburgh Plata Glass CCBy*"?---"" Project No.. 164-x November 8, 1950 Date of Report. NATURE OF REPORT Preliminary Progress MO. .flf .HQYSabtff. Final M e llo n I In iv c rs ilv A rchives Constituents Sample So. Major Minor 9 1000 < 5 Ca silicate, CaO quarts 1001 < 5 Ca silicate, CaCO^ quartz 1002 < 5 Quarts analyzed quartz 5 3 51 r - r Douglas T. Pitman Leroy S. Alexander talc T: 11-9-50 I JESKARCH ASSZSTAHT <f? OA^.JL ScBICtR 7SLL0W Nuncar copies rale____ ____ ----------Huxter copies sailed ...e.-C7Date cf adilir.z..............Srm............ Adireasea do ) -. Orjjci.-.. J a - KLo.