- 15 Water samples of approximately 500 ml each taken at O, 25, 50, 100 and 300 meter depths from five stations were pooled on January 13, 1959, filtered through millipore filters (pore size .45,) and the filtrates dried. The filter papers contained particle sizes greater than .45, plus the radioisotopes adsorbed to the papers. particle sizes less than found in the filtrate. The radioisotopes with .45. plus those in solution were The results, corrected to date of collection (August 8 - 14), are as follows: wi85 Station No. 3 d/m/1 >.45y <.45u Total 1,200 26,000 27,200 Station No. 31 D.45u 0 €.45u Total Station No. 37 ).45u €.451 1, 700 1, 700 O wi85 4 Rago zr95np95 zr95ND95 105/ d/m/1 100 160 260 35 62 97 24 d/m/1 1, 300 26,160 27, 460 35 1,762 1,797 24 Zr9NIP 12/1 160/1 96/1 0 27/1 18/1 0 Total 19,000 19,000 230 19,230 83/1 Station No. 38 >.45y €.45. Total O 32,000 32,000 57 210 267 57 32,210 32,267 0 150/1 120/1 1,100 210 1,310 5.2/1 27,100 560 27, 660 48/1 Station No. 39 >.45. €.45. Total 26,000 On the date of analysis 254 350 19,254 26, 350 75/1 TA/1 (January 13, 1959),a major part of the radiotungsten was either in solution or ina