RESEARCH AND DEVELOPMENT ESTABLISHMENT IR. S.J. GHM FROM M. I X. HWHM RESLIRCH & DEMOFMT,, KELLBANKe IEF IWH/JP/46B-11. DATE 24th June, 1968. Enclosed are four copies of Report No. RD.583-a, which describes our work to date on the removal of polonium-210 from cigarette smoke. 4 As you will see, we cannot conclude that selective filtration of thOe compounq is not possiblee The proposed further work should, I think, help clarify the position. Enos. 4. co C= Lj%j rQ BATCo document for Province of Brlt!Sh Columbia 22 April 1999