Document a4RezyE158ej8gxx1enyxB3mM

Confidential Approved. n...N0V9 1950 MELLON INSTITUTE OF INDUSTRIAL 9 DEPARTMENT OF RESEARCH IN CHEMICAL PHY&pJHs DfVISiCn Fellow____ Mr. J. P. Morgan | RecU NOV 1 0 Fellowship No.--.----259 j dy............. R:f. Ni Project _____ 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 - analyzed - Sample So. Major Minor quartz 9 1000 < 5 Ca silicate, CaO quarts 5 1001 < 5 Ca silicate, CaCO^ quartz 3 r 1002 < 5 Quarts 51 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.-C7- Date cf adilir.z..............Srm............ Adireasea do ) -. Orjjci.-.. J a - KLo.