“ te % * ~ sy Jenny Ae Bs yey fan de i) 0 @ oa i ee en: 3 a ja) G2 o) 2 that tho total kady burdon throuthout this ontive mr mye te ed < tet 02 to vs bseausoe while wo had ouv contamination cronoins o yvory consiant, and hore was something that wis vathor intoresiing rapidly, total body burden of tho animals was fairly stcady * throuchout the seme aron. “oOo As a matter of fact, there is a téen- dency for it to incscase in distance for total kody busdens. Exoressed as total bsdy burdens, it is a little hard to prove Cur previous Work had shova that radio stontiua was the cnc witna which we wore peinarlly concornecd, Tortunatoly for us--unltortruately, porhans, in the lanevege--ctrontiun-30 te in tho persistence of oO this contamination in eny particular en- vivroument, Wo know that strontium is also primarily danesited in tho bon, If we express the activity in the animals, instead of in terzs of tetal body burden, but rathor in terms of strontiun per gram of bone, we cone across a fisure something like this (cholh denonstration). There are these conversion factors. You can soo that <7 is not much in tems of a nicrocurie, which is sonowhore around the body burders pornissible of hunans, but it is still very detectable, 4 At GO niles out, the contamin- ation of tno bone was running about CO DEM; at 140 miles out, it reaches abcut 175, a ecofinite incrcase of cCistanes. * on hag a very lonz lite, and wo can use it as a tracer instond of