, .. “.=_._— --—- -2- . . ___ . . . .. . — -. of Spiers uses’cy UZSC22.R(22). mtherst =ilk. . There is hm?m breast zi% is ratio exists i-o= the fetus and nek’~cm relative to the adult 1,2 diet. This ratio has been obsemed directly”and cm also be calculatedfrm data 1,6 which iiidicatethat the average OR body/die~ for adults is 0.25; . when factor of 2 i2crossttieplacental or i=mary mmbrane, of 0.1 to 0.L6 for ~L) or fetus is obtained.