Document ZnEQRrL8qvbndxBwjX5aj3aLO

X&y 13, 1946 Ur. U. L. Edvos Director or Research Owens-Illinois Class Company Toledo 1, Ohio Dear lir. Bowes I aa enclosing a summary of our experimental observations on tiife effect of K-Lo. At the present moment, no serious 2'csults have developed and I doubt whether the? will do so. The dust alone is not causing anything suggestive of either silicosis or asoestosis. A few of the last animals to bo sacri ficed after associated tuberculous infection give'a hint there may be some tendency for the tubercles to progress. I do not know whether this will continue or what tue subsequent course will be. I doubt very such whether you need be concerned. As indicated in the report, we h.ve had a serious problem with pneumonia in our exposed animals. At first I thought it was due to the dust, but now I rather think that this occurrence is entirely fortuitous. I believe we should continue these observations for at least another year so that wo may say with assurance that K-Lo is or is not harmless* Very truly yours. Leroy U. Gardne Director \ 3