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June % 1$50 Mr, Alexander Smith, Jr, Counsel The Davison Chemical Corporation Baltimore J, Maryland Dear Mr.

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RU SSELL M.

MEMORANDUM On the basis of the apparent fact that some portion of the 11XH in contaminated chicle occurs as particulate matter, and that it may be removed in part during the process of filtration, it would seem that the most effective filtration methods should be employed to this end.

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February &* 133$ Stone -' hummel* Blagg and Stone, Charleston* Vest Virginia ; Bear Mr* Stones* , My present plane make it quite convenient for me to see you in Cincinnati on Saturday* March Jfth.

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October 20, 193?

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O ct o b er 10, 19^ 7 Dr.

JOURNAL OF OCCUPATIONAL MEDICINE.