Document bBgqbZ8LrDz0y7GrVjZMO27R1

Confidential Mellon Institute of Industrial Research PLAINTIFF'S EXHIBIT IHF-310 UNIVERSITY OF PITTSBURGH PROGRESS REPORT for the week ended. May 21, 19^8 INDUSTRIAL HYGIENE FOUNDATION Subjects under which report is to be indexed Industrial Fellowship No. 259-lk 3 copies made: 1 - Mellon Institute 2 - Industrial Hygiene files .'V .V.* * t; r** . Worked on editing of the current Digest including addition of three new sections: -Physiological. Action, Physical Measurement, and New Equipment. Studied Jaw crusher in Institute for the purpose, of'designing ven tilating system. **:;' .'''V.-:--r. . Made dust count collected at Sharon'Steel Corporation. -': "',,,