- 15Water samples of approximately 500 ml each taken at O, 25, 50, 100 and 300meter depths from five stations were pooled on January 13, 1959, filtered through millipore fliters (pore size .45.) and the filtrates dried. contained particle sizes greater than -fgotopesadsorbed to the papers. The filter papers .451 plus the radio- The radioisotopes with particle sizes less than .451 plus those in solution were found in the filtrate. The results, corrected to date of collection (August 8 - 14), are as follows: aa ywi85 Station No. 3 >.45u <.45, Total Station No. 31 >.45y a/m/1 1,200 26,000 . Zr9onp9S d/n/1 100 160 27,200 260 wi85 4 gzrP5npy95 Rago 1 2/ d/m/1 Zr95Nb99 27,460 96/1 1, 300 26,160 12/l 160/21 €.45u Total 1,700 1, 700 0 35 62 97 1,762 1, 797 . e7/l 18/1 Station No. 37 >.45u 0 24 eh 0 €.45u Total Station No. 38 >.45u 19,000 19,000 0 230 254 57 35 19,230 19,254 57 0 83/1 75/1 0 €.454 Total 32,000 32,000 210 267 32,210 32, 267 150/1 120/1 Station No. 39 ).45y 1,100 210 1,310 5.2/1 27,100 560 27,660 48/1 €.454 Total 26,000 On the date of analysis 350 26, 350 TH/1 (January 13, 1959), a major part of the radiotungsten was either in solution or in a