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Department of Chemistry, University of Pittsburgh, Pittsburgh, Pa.
Both normal and sodium-deficient rats showed no preference for diets containing from 0.1% to 2.5% sodium chloride over low sodium diets. At lower levels, both groups preferred sodium chloride-containing diets and at higher levels both groups avoided them. An appetite for sodium bicarbonate, but not for sodium dihydrogen phosphate or sodium sulfate, was found in sodium-deficient rats. Results of tests for an appetite for chloride were equivocal.
Manuscript received 21 November 1949.