Abstract
Bean plants, grown in sand at concs. of 15-5, 9-5, 3-5, H2Ptcl8. 6H2O, are inhibited in growth, have smaller leaf area, higher osmotic pressure, have a lower transpiration rate, resist wilting much longer than controls and are less succulent. Bean plants grown in soil to which platinum chloride has been added at conc. of 15-5 fail to respond. Tomato plants grown in sand supplied with platinum chloride at concs. of 15-5, 9-5, and 3-5 are inhibited in growth, have chlorotic lower leaves and resist wilting longer than controls.

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