dk | 4 indicated with strontivn concentration in tho bone and concca- tration of phesphorous ends up so that tha phosphorous rich structures are the ones mest radioactive, and the fatter enes his is to cur advantace in terns of people who are eating these fish where the mederate radioactive materials are fenorally disearisd and the least radis- active materials in terms of the fish muszle, having the lover radioactivity density. 2. up as before, of course, the flow of the Columbian River represen c by a factor of This n the mountains pte cu w) ta fresh season. Sue Q fell fae the spring + > QO @ a originates mainly frez which changes >] oe te aus ing 2 by Pearce, o proninatels 3 - Dr. S 2 mentioned by u iS five , as gS ’ @ heve, ee In tezrms of scasonsi variations which have boon brought and this tine of the year tho yeather warns un and we get a few rains up there, and these snows molt vory ranidir, flush down through the rivor and the flow gces up. OF course, the radio- active materials in the river water, if the piles operate on a level scale, the dilution effect here is ths one which is important, so you have activity density of the water being the revorse of the flow pattern. Again, we find a different seasonal pattern in terms of the river organisms which are low during the cola winterronths., They are high during the late fall months and wo have supcrinvosed hera a temperature curva, and you can see the goneral similarity of the temnerature curve and the activity density curve. This brinss out the physiolozical ~ve