MITCHELL (continued } aii. strontiua problea to the sr’, in other wrds the inert strontiua vhich exists in the enviroment, to the prot the &r?” ocntanimtion, we have rua up against the fact not very mich is known about strontium metabolisa, It presumably just a trace elesent without any metabolic One of cur figures, using the standard man as having 7, grans of bone with 1,000 grams of caloium is an ons to reaeuber, During the process of growth of the vidual that would be abcut the figure you would get, this caleiva in this ageduring the growth years 20 j ami this being 1,000 grams calcium, So that a growing parson would accumilate caloiun, starting at birth with about gvans of calcium, ani gcing up to 1,000 grans of calciua hk the tine he reaches 20 years. LIBBY: What percentage cf the total calciua he ate is that 1, greans? MITCHELL: | That would vary with the diet, He's accumilsted it at abpu 1cO milligrams a day, on the average, The bedy will keep caloiun in equilibrium, That is, if yon take in an 14