Table IV. - (Continued) Sea foods, 2) Sea water!) PPM Phosphorous .001- edible portions PPM .10 Iron 002 - 02 Copper O01 - 01 Manganese .00i1- .01 Zinc 005 Cobalt ? 1,100 - 8,910 Fish muscle”) Concentration Fallout or soft parts in fish muscle, radio- PPM median value isotopes 680 - 4,600 52,000 4- 170 <1- 56 2, 500 <i- 37 <1 - 37 3, 700 <1 - 252 25, 000 2- 47 4,900 zn85 3, 200* Co?!, 98, 60 <1 - 1+ B. Elements always present in man but of unknown function?) Silicon .02- 4.0 <1 - 40 10 Aluminum .o <l1 - 40 180 Arsenic 015 <1 - 12 490 Nickel 0001 ? ~-- Fe°5, 59 Mn°4,56