STRONTIUM IN MAN AND BEAST 



90 



Sr/g Ca 



5>xmC 



90 



Mixed diet 



Sf/mg Sr 



2 5^^C 

 mg 



Mother 



Newborn 



Feedrng 

 infant 



Bone space and 

 extracellular space 

 not yet in equilibrium. 

 ECS determined 

 largely by diet . 



Foetus bone space 

 and E.CS in equilibrium 

 with each other 

 reflecting maternal 

 plasma 



Predicted 

 di fferences 

 between breast 

 and bottle- 

 fed infants 



. mg J 



Figure 1. Representative observed and predicted values for ^''Sr/g Ca and ^"Sr/mg Sr ratios; 

 predicted %alues in brackets — assuming infant discriminates as adult; obser\'ed values 

 unbracketed. Outer circles — extracellular space. Inner circles — bone space 



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