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110 <br />HUMIDITY CELL TESTS <br />Cumulative Iron from Samples <br />100 <br />90 <br />'o <br />0 80 <br />M <br />v <br />0 <br />~ 70 <br />W <br />^j ¢0 <br />U 50 <br />d <br />," <br />0~ / <br />f~ -- -2!' <br />d <br /> <br />40 <br />30 -~- <br />0 <br /> <br />2 9 6 <br />TIME (weeks) <br />^ 282T <br />8 <br />10 <br />