Document 4a2axywG4rxzxOD7dZw3xoKej

Mellon Institute of Industrial Research UNIVERSITY OF PITTSBURGH PLAINTIFF'S EXHIBIT PROGRESS REPORT for the week ended. March 12, 1947 INDUSTRIAL HTGIENE FOUNDATION Subjects under] which report is > to be indexed) Industrial Fellowship No. 259-13 5 copies made: 1 - Mellon Institute 2 - Industrial Hygiene file The concentration of mercury vapor was measured in Room 512, Mellon Institute. ' Samples of dust and fume were obtained from the Slab Grinding Department, American Rolling Mills, Inc., Butler, Pa. This is a part of the Grinding Wheel Association study. A report was prepared on the survey made for Pittsburgh Plate Glass Company, Works No. 4, Ford City, Pa. Work was continued on the revised bulletin, Routine Sampling and Analysis of Air Contaminants. R: March 11, 1947 T: March 18, 1947 MELLON INSTITUTE r? : Y'Y '<~r tv u Francis R. Bolden Senior Fellow 00042? SOM