In so complex an organism as one of the higher plants it is difficult to determin the true functions of the various elements found in it. Loew2 has d e k e d the uses of sulfur and chlorine in the plant. Sulfur is found in plants in definit chemical organic compounds, such as edestin, which contains 0.884% SO3, legumin 0.385%, and gliadin of wheat I ,02770.~ Suffw also occurs as mustard oils in plants; for example, the mustard seed and onion. Sulfur in mineral form as sulfates occurs usually in

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... smaller quantities in plants. Arendt, Ulricht, E. Sch&, Berthdot and Andre, and Fraps,* have investigated this form in plants and found it to vary in parts of plants 1 Published with the permission of the Secretary of Agriculture.