Document 9jR7rRvZNnJ3dom9G8k5LepR

9 In replying nddreee the Surgeon Oenercl D. t. Public Bealth Berrien federal siojpjn agdici V. 8. PUBLIC BIJLTR Btt?ICI Washington U (Betheada Station) February 2J, 1949 Ir. VUUu Z. Pluck Industrial Byglene Blrlalon Wisconsin State Beard of Bcalth State Office Building 1 Vest Vllson Street adlson 2, Vlieencia Bear Ir. Plucki Throughi Or. Carl W. Beupert State Bealtb Officer The caaple of nettled duct uhleh you cubnltted with yo'ir letter of January It, 1949 haa been aaalyaed oltb the felleving reaultat Lab. Bo. Field Identification Free Silica lebtatof 12915 Settled duet fron cutting of I-LO 13 % (See note)* There are a number of ehealeally different mlaernln obleh are included under the general daaaif1 cation of aabeatoa. To analyte for eaeb of these would be a coo aideruble task. Inctetd a erublned nlercacople and chenleal procedure haa been uaed to approximate the aabeatoa content of the cample. There la more than 5$ and probably leaa than 12$ of aabeatoa in thla ample. Chryaotile la by far the principal nlneral In com mercial gradea of aabeatoa, but la vaa not nlgnlfleantly present la thla cample. ery truly youra. CRBiJim CCt PBS Regal. Of. J* 0. B. Byera, Soleutlat laboratory Sectloo Dirlaloo of Industrial Bygleoa