IRON AND COPPER IN OYSTERS. 



23 



The relative quantities of iron present in the gills as compared with the rest of 

 the body were next determined in French, Dutch, and American oysters. Six oysters, 

 or the gills of six oysters, were analyzed in each case with the following results : — 



Finally, the total iron in a number of kinds of oysters was determined in order 

 to ascertain the normal quantity present. These data, which are tabulated below, show 

 a fairly constant proportion of iron per oyster, from 0.15 to 0.36 mgrme., or from 0.18 

 to 0.65 per cent, on the ash. 



