Document O0XqOnZk50j4RJdGKxOEzaop

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 ccgpg"7~--"~ 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, CaCOs 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 uai=____ ____ ----------- Huxter copiea sailed ...e.-C7- Date cf auilir.z..............Srm............ Adireased do ) -. Orjjci.-.. J a - KLo. '