MINERAL METABOLISM 



307 



S.2 



" 



s 



to 



070^00 

 CO i i t^ CO 



t^ x eo co 



x !: o 



s " CC 



* oc c ac 



5* 111 



c . 



- ^ t- 



x^ r- 1>- 



. ac . 



O S X 



or*? 



sis 

 ^ 



?2 0) 



