Document 8VpyeBnGwEV3aGmnqBMXoO17m

Owens-Illinois Glass Company ur ouk*i" ( ]4^jturrTUHiiR or Cw<i 1`moouer* CrNf rt/vi. Okuccs Toi.i:x>o Lay G4 , l?4-v Or. Leroy Cardr.or, The Saranac Laboratory' for the Study of Tuberculosis, Serunnc Lake, Kew York. Dear Dr. Gardner: So.r.e months ago we submitted to you cone sen pies of hydrous calcium silicate, and you gave us some preliminary observations regarding it. At that tine we suggested that you proceed with a complete study of the matter, and we are interested to know hew far this has progressed.