VOICE (ecntimed ) t SOLOMON: thousand year tines scale, De you knew the ancunt of calcium in the tep soll? The total ancunt cf calciua? I have a figure of 1600 parts millicn, as the available calciua content In soll, and you knew the tctal calolum then perhaps you eould find frecticn of available strontium by using the sane figures bot I don't knew that, MITCHELLs I don't know that either, FRIEGERs The figure is 365,000 parts per million, “" TOMDNs Cf total calcium, ani if one figure of 1,000 parts of available calciuz par million is true, then one part is _ ~VOICEs Ia cur Jnboratery we've done sone base exchange work on strontium 90 using ncrmal clay, mrual agricultural clay scils, ani ve fini that up as high as 30 percent canbe fizod, unavailable, VOICE: D4d you say strontinun nitrate scluticns? VOICE s Bp, i mean what .. (salt ) LIBBY: It is just a - just dliute aqueous aciuticn, 4 a ~ normal precess of weathering, tut this is a 20 to one (23