Document 6RROX60mzKn1BEN2D09zaLaQm

FILE NAME: PPG (PPG) DATE: 1949 June 3 DOC#: PPG011 DOCUMENT DESCRIPTION: Progress Report from Mellon Institute of Industrial Research C'<'NI'h >i :n t i a i . ]SJle l l o n I n s t it u t e o f I n d u s t r ia l R e s e a r c h UNIVERSITY OF PITTSBURGH PROGRESS REPORT fo r the vek ended June 3, 19^9 IMSUSTKIAL HYGIENE POUNDATIOff Subjects under which re p o rt is to be indexed In d u s tria l F ellow ship No. 259-15 Several days vere spent counting dust, samples -from Corhart R e fra cto ries. The Canadian dust samples were a lso equated. D iffic u ltie s vere encountered in obtaining check c o u n ts. The . . longer the samples stood, the higher the count, which seeaed to In fer th a t something was being leached out of the .rubber stoppers. . v \v . . ' ` Two sp ira ls from Corhart R efractories were "broken down and ' .. counted by the re g u la r technique.: - ' * r*